September 8th, 2019

Sunday GunDay: 6mm Dasher Winner From Forum Classifieds

Bob A. 6mm Dasher Sacramento F-Class March Madness

With the 6mm Dasher cartridge becoming popular with PRS/NRL competitors as well as the benchrest crowd, we thought it was time to re-visit a special rifle chambered for the 6mm Dasher wildcat. This gun has a great story behind it. Forum member Bob A. (aka “Killshot”) used his “Forum Classifieds Special” to beat all comers in the F-Class Division in the American-Canadian Match and the Long Range Regional Match in 2013 in Sacramento, CA.

Bob’s 6mm Dasher sports a blue-printed Rem 700 action. Who says you need a high-dollar custom action to run with the big dogs? In fact, this same gun, built with components sourced from AccurateShooter Forum Classified Ads, set a Sacramento F-Class range record of 200-17X a few years back. In this story, Bob talks about the build, and he explains his methods for loading ultra-accurate Dasher ammo.

Bob A. 6mm Dasher Sacramento F-Class March Madness

Bob’s Budget-Build Dasher F-Classer
I wanted to build a proper rifle for F-Open but needed to keep it simple and, well, cheap. I found a solid “base” to build on in the form of a Dave Bruno-built, “pre-owned” 6-6.5×47 Lapua that I located in the AccurateShooter Forum classifieds in late 2011. The base action was a trued and blue-printed Remington 700 receiver circa 1971 with a spiral-fluted bolt. It was in a Shehane ST1000 stock painted sky blue and had a Jewell 1.5-oz BR trigger. I sent the bolt to Greg Tannel (Gretanrifles.com) to have the firing pin hole bushed and sleeved, the ejector removed and the hole filled and the face trued. I upgraded to Tannel’s Light Steel firing pin assembly while it was out.

Having the working bits completed, I needed a barrel. So I went to the AccurateShooter classifieds again and found a 1:8″-twist, 30″ x 1.25″ (diam.) Bartlein with a 0.236″-land bore. I called Dave Kiff and explained my pursuit and he recommended his PT&G “world record” 6 Dasher reamer (.2704″ no-turn neck and .104″ freebore). A month or so later the reamer and gauges arrived.

I had the barrel chambered by Marc Soulie of Spartan Precision Rifles (510-755-5293, Concord, CA). Marc is a great builder and I’m pleased to call him a friend.

Bob A. 6mm Dasher Sacramento F-Class March Madness

The rifle got its good looks from a Pennsylvania artist named Kenny Prahl. His Prahl Designs shop (724-478-2538) added the white ghost-flames over the existing sky blue metallic paint.

Looks Great, Shoots Better
Fire-forming showed great promise — ten-shot groups of half an inch at 200 yards were typical. I lost only one case to a split neck and the “blow lengths” are good and consistent. This was followed up with load development which saw 100-yard, five-shot groups in the .1s and .2s as the rifle showed its preference for Reloder 15 over Varget powder, and for CCI 450s over all other primers. The bullet of choice was the ever-popular Berger 105gr Hybrid Target.

Bob A. 6mm Dasher Sacramento F-Class March Madness

In February 2012 I began shooting the Dasher in monthly club matches at the Sacramento Valley Shooting Center, the home range of a number of excellent F-Class, Benchrest and High Power shooters. Using a Farley Coaxial rest up front (also picked up from a WTB ad on AccurateShooter’s Forum) and an Edgewood bag in the back, I gradually improved my gun-handling to the point where I could shoot a respectable score. This was very different from the bipod shooting I’d done in the past in F/TR.

Bob A. 6mm Dasher Sacramento F-Class March Madness


Bob A. 6mm Dasher Sacramento F-Class March MadnessDasher Loading Tips
My chamber is set up for blue box Lapua 6mmBR brass. My case preparation is straight-forward. I fire-form with virgin cases right out of the box. I don’t size them but I will give the primer holes a good look and clean up the flash hole with a .058″ bit in a pin vise. To fire-form, I seat a Berger 108gr BT .030″ into the lands over a standard 6mmBR load of Varget.

For match loads, I use Alliant Reloder 15. While Varget is less sensitive to temp changes, RL15 has given me lower extreme spreads and better long range control. [Bob acknowledges that every barrel is unique, so a different powder, such as H4895 might work better for you.]

I clean my fired cases with stainless steel media in a Thumler’s rotary tumbler after every firing. I anneal after every other firing using a Bench-Source machine which is very well made and easy to operate. I use a Whidden full length bushing die with Redding bushings for sizing.

After sizing, I chamfer the inside of the neck with the K&M tool which has a pilot rod centered in the flash hole. Then I’ll give the neck and mouth a “once over” with some 0000 steel wool. I finish loading off with a Redding Competition Seating Die with the micrometer top.

Bob A. 6mm Dasher Sacramento F-Class March MadnessI use a carbide ball on the expander rod of the full length sizing die. I use a .266″ TiN-coated bushing and the ball just kisses the inside walls of the sized neck. I get very consistent neck tension this way and have had no issue with split necks.

Seating Depth Considerations
With fire-formed brass, the junction of the bullet’s bearing surface and boat-tail is above the neck/shoulder junction of the case, so I have no issues with donuts. You can see how a loaded round looks in the photo at left. For occasional trimming, I use a very nice little Possum Hollow trimmer that indexes on the case shoulder.

Permalink Bullets, Brass, Ammo, Competition, Tech Tip 1 Comment »
July 14th, 2019

Save Time and Bullets — Fire-Form with your Fouler Shots

Fire-forming fouler barrel life fouling shots

PPC Fire-formingHere’s a tip for guys who shoot the 6 PPC, 6 Dasher, 6 BRA, .284 Shehane, or other wildcat cartridges that require fire-forming. Use your fouler shots to fire-form new cases. That way your fouler shots do “double-duty” and you get your brass fire-formed without putting extra rounds through your expensive barrel.

This procedure is recommended by Joel Kendrick, the 2004 IBS 600-yard Shooter of the Year. After he cleans his barrel, Joel knows it takes two or three shots to foul in the bore before accuracy returns. When shooting his PPC, Joel uses those fouler shots to fire-form his new brass. Joel explains: “I like to have relatively new brass always ready. By fire-forming a couple cases after each barrel-cleaning during a match, by the end of the weekend I’ve got a dozen or more freshly fire-formed cases to put into the rotation. If you do this with your fouler shots you get your fire-forming accomplished without using up any extra barrel life.”

This not only saves barrel wear, but it saves you trips to the range for the purpose of fire-forming. We thank Joel for this smart suggestion. For those who do not have a dedicated barrel for fire-forming, this should help keep your round-count down. Note: With this fouler fire-forming routine, you should ALWAYS do the fire-forming with the SAME POWDER you load for your match ammo. Joel currently works as the Supplier Quality Process Engineer for MMI-TruTec, a company that offers barrel surface coatings that can further extend your barrel life.

Permalink Bullets, Brass, Ammo, Reloading, Shooting Skills No Comments »
December 31st, 2018

New Mag-Fed Action Optimized for 6 Dasher and 6BR Family

Borden super short 6 action 6mmBR Dasher BR Ackley BRA 6

The 6BR Improved cases have become very popular in tactical competitions. In fact the Precision Rifle Blog reports that the majority of Top 10 PRS and NRL shooters are now running some version of the 6mmBR Norma case — such as the 6mm Dasher, 6BRX, or 6BR Ackley. In fact “40% of those ranked in the top 10 in either league were running a 6mm Dasher”. This short, fat 6BR improved case can push the 100-107gr bullets to 2950+ fps, a well-known accuracy node. Yes the 6mm Creedmoor and 6XC can push heavy 6mm projectiles faster to be sure, but there is a trade-off in barrel life. The 6BR Improved cases represent a “sweet spot” for the tactical game, offering outstanding accuracy, with less recoil than bigger cartridges, including the 6.5 Creedmoor.

The only real downside to the short/fat 6BR-based cartridges is that they can be finicky when feeding from a magazine, at least without some modifications to the follower and feed lips. There are kits that can help with this, but now there is an even better solution — a premium custom action designed specifically to feed the 6mm Dasher (and similar cartridges) from a magazine. This action, the Borden Super Short 6, was recently, unveiled on Facebook by PRS competitor John Hargett. This action, available in both right- and left-hand versions, features a dedicated new Super Short 6 (SS6) magazine optimized for Dasher-sized cartridges. The bolt has a shorter throw than a standard Rem short action. We think this new action could become VERY popular with tactical shooters, and varmint hunters.

John Hargett says: “Installing spacer kits or possibly having a nose dive in full-size .308 mag is in the past! This will fit all 700 stocks and chassis and AICS bottom metal. So no need to change what you are already using. Borden creates a masterful action at an extremely affordable price.”

Borden super short 6 action 6mmBR Dasher BR Ackley BRA 6mm

Key Facts about the Borden Super Short 6 Action and SS6 Magazine:

1. Rem 700 Footprint
— The Borden Super Short 6 action is internally tailored to the 6mmBR cartridge and its wildcats, but externally maintains Rem 700 action dimensions. This means the action IS compatible with the stock and chassis you currently own. And, the Borden Super Short 6 comes in both right-hand and left-hand versions, with PVD coating available (on action and/or bolt).

2. Rem Trigger Compatibility — The Borden Super Short 6 action works with Rem-compatible triggers, and the actions are specifically timed to work with trigger of your choice.

3. Dasher-friendly New Mag Design — The patent-pending Super Short 6 magazine is sized right for the 6mm Dasher and all the 6BR family. The follower and feed lips are configured to allow smooth, reliable feeding with no “magazine nose dives”. Even with the optimal design, the SS 6 magazine will work with all chassis profiles and bottom metal made for AICS-type magazines.

Borden super short 6 action 6mmBR Dasher BR Ackley BRA 6mm

Here is the description from Borden Rifles website:

“The new action from Borden Accuracy (Borden Super Short 6) features a Rem 700 short action-compatible footprint with a shortened magazine well and shortened port set up specifically to reliably feed 6 BR, 6 Dasher, 6 BRA, 22 BR cartridges. The bolt has modified Borden bumps to aid in cycling in the dirty environment. The pictured action shows our standard bolt handle and tear drop knob. Production models will feature a handle that is threaded on the end so individuals can use their preferred knobs. I have been one of the individuals that developed the bolt timing and neutral handoff with the trigger for competition shooting to minimize rifle upset in the bags when closing the bolt. These actions will be available with either the neutral timed handoff or with about .03 to .035 inch cock on close. The cock on close option has much easier bolt lift that seems to be favored by PRS competitors. For now the bolts will have spiral flutes but future versions will have diamond flutes as an option. Development work will be done to also handle the .223 Rem and the PPC family.”

Precision Rifle Blog 6mmBR Dasher BR Ackley BRA 6mm

6mm Dasher and 6BR Wildcats Favored by Top PRS/NRL Shooters

According to the Precision Rifle Blog:

1. The vast majority of PRS Shooters surveyed are now shooting a 6mm cartridge of some kind.

2. While the 6mm Creedmoor is still very popular, the 6mm Dasher is now the #1 cartridge among leading PRS and NRL competitors surveyed. (SEE Chart HERE)

3. If you include the 6BRX, 6BRA, and original 6mmBR cartridge along with the 6mm Dasher, this full family of short, fat cartridges is now used by twice as many top PRS/NRL competitors as the 6mm Creedmoor. And the 6.5 Creedmoor has really fallen from favor.


Credit Boyd Allen for Borden Action product find. Credit PRB for data on PRS/NRL cartridge use.

Permalink Gear Review, Gunsmithing, New Product, Tactical 9 Comments »
April 19th, 2016

Fun Shoot — The St. Thomas Pennsylvania Groundhog Match

Varmint Groundhog Match St. Thomas Sportsmen's Association Assn Sportsman's Shoot

St. Thomas Groundhog MatchSt. Thomas Groundhog Shoot, Report by Jonathan Trivette
Nestled at the base of a mountain in south-central Pennsylvania is the St. Thomas Sportsmen’s Association. On a cool Saturday morning you’ll find some of the area’s best shooters at the monthly Groundhog Match. The match attracts shooters from Virginia, Maryland, West Virginia, and of course Pennsylvania.

It may not be the longest-yardage match in the area, but it can be the one of the toughest. The range is sloped up the mountain a little so the winds can be very tricky. Often times the three wind flags at 200, 300, and 400 yards will all be blowing in different directions.

Varmint Groundhog Match St. Thomas Sportsmen's Association Assn Sportsman's Shoot

A Class for Everyone
St. Thomas’s Groundhog match has five different classes: Heavy (Unlimited) Custom, Light Custom, Heavy Sporter, Light Factory Sporter, and an AR Class. The Heavy Custom is any gun over 17 pounds while Light Custom is any gun up to 17 pounds. The Heavy Sporter is any factory gun that has a heavy/varmint barrel on it. The Sporter class is any factory rifle that has a light profile barrel on it. And the AR class is any AR style rifle. CLICK HERE for Match Rules.

Groundhog Match Format
Signups start at around 7:00 am the day of the match. During sign-up you’ll choose a bench from the 20 available benches. The cost is $15 per gun and you can shoot as many guns as you would like. I’ve shot as many as four different guns but that makes for a busy day. For the Heavy Custom and Light Custom you will shoot 5 shots for score at 200, 300, and 400 yards. In the Heavy Sporter class you will shoot 5 shots for score at 100, 200, and 300 yards. In the Sporter and AR class you will shoot 3 shots for score at 100, 200, and 300 yards.

Varmint Groundhog Match St. Thomas Sportsmen's Association Assn Sportsman's ShootThe Targets feature a groundhog with scoring rings on the left side and 5 practice rings on the right side. Shooters get as many practice shots as they want, subject to a time limit. The three relays run 6 minutes, 6 minutes and 9 minutes respectively.

The match is very well-organized yet has a “laid-back” feel. The first relay starts at 9:00 am and the match is usually over around 1:30 pm. There’s a covered picnic table area for socializing with fellow shooters while waiting on your relay. They have doughnuts and coffee in the morning and usually have some very good chili and hot dogs (for lunch) in the concessions area.

Groundhog Match Results
April 16, 2016

On Saturday the weather was perfect and conditions were very good early on. However, by the time the last relay rolled around, mirage made it difficult to see. Ben Brubaker obviously had less trouble than most finishing 1st (143.02) and 2nd (143.02) in the Heavy Custom Class and 1st (144.04) and 3rd (142.04)in the Light Custom class using a 6mm Dasher in both classes. Bob Daron won the Heavy Sporter class with a score of 144.04 followed by Fred Kaminsky with a 142.06. Sporter class proved to be a family affair, with the Bollinger brothers, Glenn (87.01) and Bob (83.02) finishing first and second. We had one junior shooter on Saturday, 7-year-old Lydia Funk. The talented yound lady shot a 68 in Sporter class with her .223 Rem.

Varmint Groundhog Match St. Thomas Sportsmen's Association Assn Sportsman's Shoot

You may have missed the first Groundhog Shoot of the year, but there are several other chances for you to get out and test your skills against some of the best shooters in the region. St. Thomas Sportsmen’s Assn. has one shoot a month until October on the second Saturday of each month. Don’t think you have to be a professional shooter to come to these matches. Take it from me as I started shooting these matches about five years ago with a $270 Savage sitting on top of homemade sand bags. The guys here are great to shoot with and are always willing to help out a fellow shooter. They made me feel right at home and always helped me when I have any questions. I started doing this to become a better shooter for deer hunting. I continue to do it because I fell in love with the sport. So if you are looking for something to do on the second Saturday of the month come out and test your shooting skills and enjoy the fellowship of like-minded shooters.

Varmint Groundhog Match St. Thomas Sportsmen's Association Assn Sportsman's Shoot

CREDIT: We want to thank Jonathan Trivette for supplying this story and the photos. We welcome reader submissions such as this.

Permalink Competition, Hunting/Varminting No Comments »
August 27th, 2015

DJ’s Brass Service Hydro-Forms Cartridge Brass

Darrell Jones DJ's Brass hydraultic hydro-forming cartridge brass 6 Dasher 6mmBR 6BR BRX BRDX

DJ’s Brass Service now offers custom case hydro-forming to your exact specs. Darrell Jones offers this service for a variety of popular cartridges: 6mm Dasher, 6mm BRX, 6mm BRDX, and 6mm Shehane. After hydro-forming your brass, Darrell can also neck-up or neck-down the cases to meet your needs. For example, if you shoot a 22 Dasher, Darrell can hydro-form the cases and then neck them down to .22 caliber. He can also turn the necks to your specs (for an additional charge).

Darrell is a hydro-forming wizard who has perfected the process over the last couple of years. He has learned a few special techniques along the way to ensure uniform case-forming. Without revealing any trade secrets, we can say the Darrell has very special dies and Darrell doesn’t use a mallet or hammer — he has a system that is much more consistent. Darrell tells us: “Many of my customers take this brass and load it ‘as is’ and go straight to a match and shoot some very nice groups.”

Hydro-forming by Darrell costs $0.60 (sixty cents) per case with a minimum order of $60. Neck-turning is an additional $0.50 (fifty cents) per case plus actual return shipping. The turnaround is usually less than five days.

With Darrell’s hydro-forming service you don’t have to buy any special dies or other equipment. Darrell says: “Simply send me the brass you need or have it dropped-shipped to me along with a fired case that has not been sized. If you need formed brass for a new build (gun not yet fired), let me know and I will size the brass to fit within .001 of a PT&G GO gauge.”

For more information, visit DJsBrass.com, or call Darrell at (205) 461-4680. IMPORTANT: Contact Darrell for shipping instructions BEFORE sending brass for processing. In a hurry, don’t have time? Just call Darrell and he’ll make something work for you.

DJs Brass hydro-forming

Hydro-Forming Customer Reports

Here are testimonials from recent customers.

“Recently had Darrell Jones of DJ’s Brass Service hydro-form 6 BRX brass for me. The turn around time was very fast and the brass was to the exact specification I ask for. I actually shot the hydro-formed brass in a match [without further fire-forming]. It shot a 3.597″ — pretty amazing. Let DJ do the work for you!” — Mike Wilson (3 Time IBS Record Holder; 2013 and 2014 1000-yard IBS Shooter of the Year.)

“Darrell Jones of DJ’s Brass Service went far beyond the call of duty, to assist me in preparation to shoot for my first time in an IBS match. I have had an interest in 1000-yard competition for many years and finally got the opportunity to try it. After researching the winning competitors, rifles, and rounds I ordered a Panda action with Krieger barrel in 6mm Dasher from Kelby’s. It was one week before the match and I had a rifle and no rounds. I contacted Darrell to hydraulically form 6mm dasher from Lapua 6mm BR brass. He formed the brass and had it in the mail the next day[.] Since I have only reloaded for hunting or magazine fed rifles I was not familiar with proper seating to allow land engagement of the bullets for 1000-yard accuracy. Darrell took the time to advised me every step of the way to allow me to shoot a 3.158″ (5) shot group to win my first round of my first competitive match ever.” — Mike Youngblood

Permalink Bullets, Brass, Ammo, Reloading 1 Comment »