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AR-10 Chambered in 300 WSM.

jesnyder

Private
Minuteman
Oct 9, 2013
6
0
The gun I bought is an Armalite that was originally a 300 RSAUM....it has since been re-barreled in a 300 WSM. I own a 300 RUM and have some idea of its capability. This is the first time owning anything like this in an AR10 platform. I was wandering about performance? Barrel life? Just anything that may or may not help with this. One thing I have read is to stick with the 150-165 gr bullets instead of the heavier loads for jamming reasons....is there any truth to that?



300 wsm.jpg
 
I did contact Carl on this. Being deployed made the conversation difficult. I was just seeing what other shooters may have seen out of this gun. I was also looking for accuracy/performance with this caliber. What kind of yardage should I see etc.
 
I think the biggest issue with WSM and RSAUM in the AR10 is gas system length. The case volume and slow-burning powders pose a serious challenge with a standard Rifle-Length Gas System in the AR10, because you have significantly higher port pressure than a .308-based cartridge.

Extended-length gas systems are the way to go with the WSM's in the AR10 I think. Before using an adjustable gas block, consider one of Slash's heavy buffers.
 
LRRPF52, thanks for the information. I look into one of Slash's buffers.

What kind of performance should I see out of this gun since its a AR platform? 600-1000 yards possibly more?
 
Well that is the thing I was informed to run 150-165 (preferred)and 180 grain bullets. Due to feeding issues with the heavier bullets. I run the 210 vld's in my 300 ultra and love them.