February 23rd, 2017

PRS Gas Gun Match — Season Opener in Florida

PRS Gas Gun Nightforce Optics CORE Florida AR15 AR
Photo Credit Michael Cage.

Sean Murphy, Nightforce Optics Marketing Manager, shoots what he sells. Sean recently competed at the inaugural PRS Gas Gun match held February 17-19, 2017 at the CORE Shooting Solutions range in Baker, Florida. Here is Sean’s report:

PRS Gas Gun Match at CORE by Sean Murphy
The series-opening PRS Gas Gun match is in the books. Ryan Castle put on a fun match to help set the tone for what this series will become. There were plenty of challenges for both the PRS and 3-Gun competitor. The best way I can explain it is to go as fast as you can because time matters, and then don’t miss because the penalties for leaving targets are harsh. I am looking forward to shooting more of these matches and would encourage any of my PRS and 3-Gun friends to give one a try.

PRS Gas Gun Nightforce Optics CORE Florida AR15 AR

PRS Gas Gun Nightforce Optics CORE Florida AR15 ARCongratulations to the USAMU’s Tyler Payne (right) for the exhibition on how to shoot this and a very commanding overall win. [Payne won overall and high military with a score that was 25% higher than the next-best finisher.] Also congrats to Rhett Walters and Terry Cross for their first-place and second-place finishes in Tac Lite (and 2nd/3rd overall). I was fortunate to place third in Tac Lite and 4th overall for the match. Thank you to FALKOR Defense for the prize table contribution.

Squad 4 was a lot of fun and I was fortunate to shoot with some of our nation’s finest warriors and competitors. It was great to see various military guys in attendance refining their craft. It was great as always to see all of my friends at the match and make new ones. While I love shooting, the people are why I keep coming back.

Gas guns to 800 yards, yep there are targets down there somewhere…
PRS Gas Gun Nightforce Optics CORE Florida AR15 AR
Jeff Cramblit Facebook photo

Gas Gun Match Loads — Short Range vs. Long Range
The .223/5.56 guns had some lag time waiting on shot impacts. I believe the long-term solution may be to find a light and fast load for closer stages for near-instant reaction time and use a heavy load for the long shots to see splash and get the target to move a little more. — Sean Murphy

GEAR Selections for PRS Gas Gun Matches

OPTICS for the PRS Gas Gun Series
I was proud to see Nightforce Optics well represented on guns, with the ATACR 4-16×42 F1 seeming to be a solid choice for many competitors. My optic of choice is an ATACR 16x F1 with a Horus H59 reticle. For this style match the magnification range, Zero-Hold adjustment and wide field of view are a perfect combination. We had some smoke roll in from area fires on Sunday, and the ED glass was an aid in finding the targets in deep haze and shadows. Because of the time component [stages are “on the clock”], being able to shoot with holdovers is key, as well as being able to make fast corrections on follow-up shots. The H59 or TReMoR 3 will be strong contenders for this.

PRS Gas Gun Nightforce Optics CORE Florida AR15 AR

BARREL Choice — Proof Carbon-Wrapped
I shot a 20″ PROOF Research carbon fiber-wrapped barrel that was expertly installed by Greg Hamilton himself. It shot lights out while keeping the gun light and handy for movement and getting in/out of multiple positions.

TRIGGER Choice
While I like the Geissele Automatics, LLC Super 3-Gun (S3G) trigger for carbines as it’s really fast, I went with their DMR trigger for a more refined break that helped on the 600-800 yard shots.

The preferred rifle color choice at the first PRS “Gasser” Match was definitely black…
PRS Gas Gun Nightforce Optics CORE Florida AR15 AR

AMMUNITION Choice (.223 Rem/5.56x45mm)
My ammunition of choice for this match was Black Hills 77gr .223 Rem. The ammo shot outstanding, especially at longer ranges. I believe the long-term solution may be to find a light and fast load for closer stages for near instant reaction time and use a heavy load for the long shots to see splash and get the target to move a little more. The .223/5.56 guns had some lag time waiting on shot impacts, so finding a way to speed that up over 20 or so shots might save a few seconds per stage.

BALLISTICS Solver and Wind Meter
I continue to love my Kestrel 5700 AB. It was very confidence inspiring to show up at the range, get my atmospherics and run accurate data to get first round hits all the way to 800 yards.

BAGS and Gear
The precision rifle game seems to require an assortment of bags and other gear for the various shooting positions to conquer. My Armageddon Gear and Wiebad bags and gear continue to deliver and hold up to much abuse.

PRS Gas Gun Series Rules

For the new PRS “Gasser” Competition, the PRS developed rules on gun types, scoring, match timing, penalties, safety and other key topics. CLICK HERE for Full PRS Gas Gun Series Rules.

Scoring and Penalties
The Gas Gun Series utilizes a time plus penalty-based scoring system for all match scoring. This means the score is the shooter’s total combined time on all stages plus any penalties accrued.

Penalties are as follows:
30 seconds for any rifle targets not engaged or neutralized.
15 seconds for any pistol targets not engaged or neutralized.
15 seconds for hitting a “No Shoot” target.
No more than 50% of the stages at a match can utilize an unlimited round count. At least 25% of the targets in Gas Gun Series match must be 2 MOA or smaller. Max distance is 800 yards.

Open Division: The Open Division rifles will not exceed a caliber of .30 or a velocity of 3,200 fps. A match DQ will result any rounds over the speed limit of 3,200 fps (+/- 32 fps for environmental factors and equipment discrepancies). Match Officials may request at any point during a match that a competitor fire their rifle through chronograph. If the bullet exceeds the 3,200 fps speed limit, the shooter will receive an automatic match DQ.

Tactical Light Division: Intended to allow competitors the opportunity to compete using traditional military and law enforcement caliber. This promotes Active Duty military and law enforcement competitors use of their Service and Department-issued rifles. Tactical Light Division rifles are restricted to 5.56 NATO/.223 Remington calibers only. Bullet weight cannot exceed 77 grains and muzzle velocity cannot exceed 3,000 fps.

Permalink Competition, Tactical 1 Comment »
February 23rd, 2017

Figuring Optimal RPM with Berger Twist-Rate Stability Calculator

Berger twist rate calculator
Erik Dahlberg illustration courtesy FireArmsID.com.

Berger twist rate calculatorBerger Twist-Rate Stability Calculator
On the updated Berger Bullets website you’ll find a handy Twist-Rate Stability Calculator that predicts your gyroscopic stability factor (SG) based on mulitiple variables: velocity, bullet length, bullet weight, barrel twist rate, ambient temperature, and altitude. This very cool tool tells you if your chosen bullet will really stabilize in your barrel.

LIVE DEMO BELOW — Just enter values in the data boxes and click “Calculate SG”.

How to Use Berger’s Twist Rate Calculator
Using the Twist Rate Calculater is simple. Just enter the bullet DIAMETER (e.g. .264), bullet WEIGHT (in grains), and bullet overall LENGTH (in inches). On its website, Berger conveniently provides this info for all its bullet types. For other brands, we suggest you weigh three examples of your chosen bullet, and also measure the length on three samples. Then use the average weight and length of the three. To calculate bullet stability, simply enter your bullet data (along with observed Muzzle Velocity, outside Temperature, and Altitude) and click “Calculate SG”. Try different twist rate numbers (and recalculate) until you get an SG value of 1.4 (or higher).

Gyroscopic Stability (SG) and Twist Rate
Berger’s Twist Rate Calculator provides a predicted stability value called “SG” (for “Gyroscopic Stability”). This indicates the Gyroscopic Stability applied to the bullet by spin. This number is derived from the basic equation: SG = (rigidity of the spinning mass)/(overturning aerodynamic torque).

(more…)

Permalink Bullets, Brass, Ammo, Tech Tip No Comments »
February 23rd, 2017

Tough Field Locker Case is Great for Long-Barreled Match Rifles

Plano double gun case Amazon Field locker

Readers often ask us, “Who makes a durable, airline-worthy hard case big enough for long-barrel match rifles?” Here’s a good option — the Plano Field Locker Double Long Gun Case.

A full 54″ long inside, this Plano case will hold big rifles with 30-31″ barrels. This case is very sturdy, and will survive rough handling at airports. The case has tough latches, watertight seals, and wheels for easy transport. Right now this case is just $111.50 with Free Shipping for Amazon Prime members. This is the lowest price ever on Plano’s largest gun case.

One buyer confirms this Plano case will fit long match rifles: “It holds two 17-lb bench rifles with 30″ barrels. It is very heavily made — even more stout than a Pelican 1750. Only draw back is the weight with two guns, over 60 pounds. But for shipping guns to a match, even the airline baggage handlers couldn’t damage this case! Case is great for two long guns!” (Smitty)

Another certified buyer states: “I bought this case for a Savage 110BA .338 Lapua Magnum, and it’s so nice that I just bought a second one for a 50 BMG. There are very few rifle cases that will fit the larger rifles… and this is a great choice for the heavy caliber rifles with long barrels.” (Bruce L.)

Plano double gun case Amazon Field locker

Plano’s new Field Locker line of gun cases features reinforced construction, watertight seals, double-density foam, industrial draw-down latches and customizable inserts. These quality cases, engineered to military specifications, rival the protection offered by Pelican and SKB cases at less than half the price.

Features:
+ Cut to Fit Foam
+ Extra Wide Latches
+ Wheeled case for ease of transport
+ Cases designed to stack and interlock
+ Exterior 56.38″ x 18″ x 7.25″
+ Interior 54″ x 15″ x 6.38″
Model number#: 109540

Permalink Gear Review, New Product 4 Comments »