krhuntin
Silver $$ Contributor
Great advice, thank you. I am working on slowly adjusting the gas block but seems to be very finicky etc. So if i get that tuned correctly you think that will take care of it or what else should i do?Tell me about the gun. What parts does it have? Trying to use someone elses load can lead to a lot of tail chasing. Lucky for you xbr is one of the premer 6.5 grendel powders. So a proper load work up should yield results. What 120 are you using?
What's your gas system length? Do you have an adjustable gas system and/or different strength springs and buffer weights. My brother slapped together a 28" grendel on a standard rifle length gas system and since the bullets are slow in general the dwell time was hilariously excessive. It took an ar10 spring with an h3 buffer to stop it from destroying his brass (bent rims not split necks but still). I would suggest that you get an adjustable gas block if you don't have one as the strong spring and heavy buffer route alone can increase slam fire probability (you can get a light weight firing pin to reduce that).
Best way to get cleaner brass is with adjustable gas system too.