Combo RAS Tuner & Muzzle Brake from Bostrom Gunsmithing

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.