Rifle Accuracy System (RAS) Combo Tuner and Muzzle Brake
Product Preview by Jim Bennington
Rifle accuracy and precision have come a long way in the past 15 years. The most recent tool to significantly improve precision is the barrel tuning system. The Rifle Accuracy System (RAS) developed by Precision Rifle Systems, LLC of Myakka City, Florida, brings a fresh approach to tuning. The RAS incorporates a precision muzzle brake with the tuner.
This system provides significant precision improvements and was the subject of a June 2012 Precision Shooting (PS) magazine article, titled “Improved Rifle Accuracy” and will also be featured in an article in the November 2012 issue of PS titled “Tuning with Confidence”.
READ MORE about RAS Tuner Tests on .260 AI, .223 Rem, and 22LR rimfire rifles.
Copies of both articles and detailed instructions on RAS installation and tuning can be downloaded from www.bostromgunsmithing.com. Eric Bostrom is the distributor for the RAS.
Accuracy is the ability of a firearm to hit what it is aimed at within the limits of the precision of that firearm. Precision is the ability of a firearm to place successive shots in or near the first shot. A firearm that delivers one minute of angle (1 MOA) precision should, at 100 yards, place the bullet within roughly one inch of where it is aimed (actually 1.047″), or a sight adjustment should correct the problem. All the improvements in optics, manufacturing and components have allowed precision expectations to go from 1 MOA to 1/2 MOA or even sub-quarter-MOA.
What is the next frontier for the precision rifle? While all the other advancements were being made, advancements in the understanding and methods of managing the barrel vibrations were also being made. Once the rifle has been built and the loads developed, it is the management of the barrel vibrations that has the final influence on the bullet as it is leaving the barrel and the final influence on precision. The RAS has demonstrated with many different rifles and calibers that significant improvements can be made with a properly tuned barrel tuner system. What does this mean? Typically, there is a noteworthy improvement. In fact group size improvements between 30% and 60% have been observed with a properly-tuned barrel tuner system. This has been demonstrated on both custom rifles and loads and factory rifles.
Similar Posts:
- Combo RAS Tuner & Muzzle Brake from Bostrom Gunsmithing
- Tuner/Brakes — Dial in Smaller Groups and Less Recoil
- Tuner Basics: Guide to Selection and Use of Barrel Tuners
- Tech Tip: Pros and Cons of a Barrel Tuner
- Tuner TECH — POI Shift with Barrel Tuner Position Changes
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Tags: Bostrom, Jim Bennington, Muzzle Brake, RAS, tuner
I will say two opinions.For me this tuner brake has performed very well.My scores have improved greatly,however I recommend doing load developement without the tuner to find your rifles natualy best load then shoot several groups with tuner installed.when you find the spot you want the best groups should be recorded and try this 3 times.The location should be within a .200 window of where that group will all be in the same hole! TRY IT
I guess I don’t really see the point of wasting expensive bullets and scarce powder doing prior load testing without the tuner/brake installed. Instead, with the tuner/brake installed I would do load testing for the sole purpose of getting the desired muzzle velocity regardless of group sizes. Then I’d follow the Bostrom instructions to adjust the tuner/brake to get the minimum spread in 2 shot groups… although I’m tempted to up it to 3-5 shot groups. I also intend to do the testing with a Magnetospeed V2 Chronograph installed. I don’t want the data skewed by a rogue round that goes say 50 fps slower than other rounds in the group. Regardless of the number of shots in the group, I would discard any plots where the MV was outside say 10 fps.
Just my 2 cents.
Are you screwing with the barrel harmonics when u attach the magnetospeed to the barrel?