Review by Archangel, May 5th 2012.
Here is some info concerning the Steel CASM mount I tested recentlly side by side on the same rifle comparing it against a Larue LT608 cantilever mount.
First off congratulations, I have never fired a true 1/2 moa m14 before and it goes to show the gun is capable but the scope mount has always been the weak link.
The test weapon was a springfield armory M1A match rifle with a Kreiger 1/10 twist .299 bore 18.5 inch medium DMR stainless barrel. The stock is a SAGE EBR MOD1 stock. The ammo tested was both federal gold medal match 168 and 175 grain. The optic was a nightforce 2.5x10 nightforce NSX mounted in Badger rings.
The Larue LT608 is the standard NAVY Specwar and Airforce SOC scope mount and as expected was only capable of producing 1moa of accuracy. The steel CASM produced groups of half that.
Groups had to be fired while the weapon was cool because of POI issues with the SAGE stock. The oprod would rub against the heavier contour barrel after the barrel heated up firing longer strings and cause a 2 to 3 minute lateral POI shift. 300 hundred rounds of match ammo was fired and concluded the POI shift was chassis related and absolutely not the fault of the scope mounts. A lot of time was spent testing different preloads on the mount screws and concluded the these steel mounts only require very little preload for optimum accuracy and consistency.
After sight in the rifle was tested at 1000yards. this particular rifle took 11.6 mils to get there and the mount proved consistent in holding zero and capable of consistent hits on the 24inch steel plate. Im going to further test this mount next week after the new rifle shows and do rapid fire and 10 rounds groups and further test this mount on the new rifle out to 1000 yards.
Thanks for getting it done and also for offering to let me test out your new Blackfeather stock. Ill keep you posted on the next test.
Archangel
