Sunday GunDay: 6 Dasher Duo for Benchrest & Varmint Matches

Chuck’s Pair of Pennsylvania Dashers

The 6mm Dasher wildcat cartridge is very popular among competitive benchrest shooters, varminters, and even PRS competitors. So this Sunday we thought we’d showcase a matched Duo of Dasher rifles belonging to a Forum member Chuck L. (aka “Ridgeway”). The 6mm Dasher began as a wildcat improved version of the 6mmBR Norma cartridge. The Dasher has been very successful in competition, and now factory Peterson 6mm Dasher brass is sold by Grafs.com. And Alpha Munitions also offers high-quality 6mm Dasher cartridge brass.

Chuck has a prize pair of 6mm Dashers for competitive benchrest and varmint matches in Pennsylvania. Both guns feature Kelbly Panda RBLP actions, Bartlein 8-twist barrels, and Shehane Laminated Tracker Stocks. However, the two rifles are not exact twins, as you can see. One, which we’ll call the Big Dasher, is built on a Shehane ST1000 Tracker stock. The other gun, the Small Dasher, sports Shehane’s “Baby Tracker” stock — a design used with great success by Richard Schatz. The Big Dasher, optimized for 1000-yard competition, has a slightly longer freebore — 0.136″ vs. 0.104″ for the Small Dasher.

Chuck tells us: “I don’t get out shooting competition as much as I want due to time and family, but when I do compete, I shoot a Groundhog match at Southfork Rifle Club in Beaverdale, PA. Info on Southfork Club events can be found at Southforkrifleclub.com. The Southfork match is basically a 100-, 300- and 500-yard match with one sighter the entire match and 5 shots at each yardage for score. The Small Dasher, with the shorter ‘Baby Tracker’ stock, was set up for the Southfork Rifle Club’s ‘Light Unlimited’ class which has a 13.5-lb max weight.” (Editor: ‘unlimited’ is a misnomer for a weight-limited category.)

Chuck adds: “The Big Dasher with the heavy ST-1000 stock is set up for 1000-yard benchrest matches in Light Gun class. I shoot 1K matches with it at Reade Range in southwest Pennsylvania. One ironic thing is, it shoots the same load I’m shooting out of the lighter gun rather well. The only difference between the two chambers is the freebore is roughly thirty thousandths longer on the 1K gun (Large Dasher). I will also shoot this at Southfork in the ‘Heavy Unlimited’ class.”

Both Dashers Group in the Ones at 100 Yards
Chuck favors 107gr Sierra MK bullets in both Dashers. Other components are: Reloder 15 powder, Lapua cases, and CCI 450 primers. His main load for the Small Dasher is 33.0 grains of Reloder 15. This load shoots in the ones at 100 yards. For the Big Dasher Chuck reported: “I’m still working on a load, although the same 33.0 grain load shoots in the ones in the heavier gun as well. I’m still looking for more velocity and my ‘max’ node.”

Dasher Brass — Four Options

1. Buy Peterson 6mm Dasher Brass
In years past, you had to create your own Dasher brass, by fire-forming (with or without projectiles), or by hydro-forming. However, Peterson Cartridge now offers quality factory-made 6mm Dasher brass. This brass is available right now at Grafs.com.

If you do not want to waste time with fire-forming or hydro-forming, you can look for Peterson 6mm Dasher brass. This is excellent quality brass that has earned high praise from purchasers. The price — $62.99 for 50 cases at Graf’s (i.e. $1.26 per case) — is less than what you’d pay for Lapua 6mmBR brass, which is $149.99 for 100 cases or $1.50 per case. The advantage is that you save time, barrel life, and you won’t lose any cases to split necks. Peterson brass can be ordered from Grafs.com.

2. Buy Alpha Munitions 6mm Dasher Brass
Another great source for ready-to-run 6mm Dasher cartridge brass is Alpha Munitions. The made-in-USA Alpha 6mm Dasher brass is long-lasting and has been very popular with Benchrest and PRS/NRL competitors. Alpha 6mm Dasher brass costs $135.00 per hundred, or $1.35 per case. Unfortunately, as of 2/23/2025, this Alpha 6mm Dasher brass is out of stock, but it should be available later this spring.

One tip — as the capacity may vary slightly from Lapua 6mmBR brass fire-formed to 6mm Dasher, you should work up your load. Also, if you are chambering a new barrel you should get a chamber reamer that is optimized for the Alpha 6mm Dasher brass dimensions. User reviews of the Alpha 6mm Dasher brass have been highly positive: “Fantastic packaging and fantastic brass! It’s pricier than some other brands but there is a reason for that. It’s a quality product worth every penny.” — Chris Vaughn.

3. Fire-Form Dasher Brass with Bullets Hard in Lands
Chuck fireforms his Dasher brass for both rifles. Because he has a tighter-neck chamber, he neck-turns the brass first: “To fireform, I turn my cases down to fit the chamber and stop where the false shoulder makes snug contact with the chamber. Fire-forming rounds are loaded up with a 29-grain charge of H4895 or Varget and a 108gr Berger bullet seated hard into the lands about 0.020″ past initial contact with the rifling. It takes about three firings to make a nice clean Dasher case with a sharp shoulder.”

Chuck anneals his Dasher brass regularly to help maintain consistency: “I anneal about every 3-4 firings. I have many cases that have about 10+ firings on them and they are still shooting well. The primer pockets are a little looser, but still hold a primer.”

4. Have Darrell Jones Hydro-Form Your 6BR Brass to 6mm Dasher

DJ’s Brass can hydro-form a wide variety of cases for a modest fee

Fire-forming all your own 6mm Dasher brass takes time, costs money (in bullets and powder), and consumes precious barrel life. Well there IS a better solution — you can have your new brass hydro-formed by DJ’s Brass to your exact specifications for a $60.00 per hundred, which includes annealing.

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: 6 PPC, 30 PPC, 30 BR, 6 BRA (BR Ackley), 6mm Grinch, 6 BRDX, 6 BRX, .260 Ackley, .284 Shehane and of course the very popular 6mm Dasher. After hydro-forming your brass, Darrell can also neck-up or neck-down the cases to meet your needs. He can also turn the necks to your specs for an additional $0.60 per case.