Aoudad shooter1975
Well-Known Member
Sure I'll comment my 338 RCM has a 19 in barrel, I lose 16 feet per second adverage over my friend Hawkeye with a factory 20 in barrel...is my 338 RCM loud...well yeah but so is my 24 in barrel 338 Norma, and my 25 in barrel 300 Norma...and my 24 in barrel 257 Weatherby, etc...I think there is a trend here. The RCM was developed for a 20 in barrel and the superformace powder does wonders in the short tube. I've owned a couple of 300 WSMs and they do better with 24 in barrels--when you cut them below 22 they started to lose gas...on the RCM we have not tested one over 20 inches. The reason I wanted a 18 in tube is I didn't think I'd lose over 50 feet over a 20--and if I put a brake on it the total barrel would be 20 inches--and yeah I think I could get a 180 going 2700 out of that tube..that would easily get me to 500..all this type of gun is meant to do.