I have a 6.5 Grendel Howa Mini. Did the one shot clean/Sweets. Barrel cleaned up in 10 shots...unbelievable for a production gun! I get 3/8" 5 shot groups@100yds if I do my part. 123 SST 28.0 8202 powder, .010 into lands . Cut down mag well, Aussie trigger job @ 8 oz.It shoots better with the can than without,but thats what I built it for A small quiet sniper rifle! I love this little gun!