I bought a couple boxes to try too, I'll let you know how mine shoot soon. Do you have an adjustable gas block? Setting ? Did you try loading one round and seeing if the bolt locks back after firing ?Bought some 115 MSR to try out as I am looking at other options than my standby load, 120 SST. I loaded 5 rds in my 15rd mag and attempted to shoot. Each rd failed to properly eject. Fired case gets jammed sideways is ejection port while bolt is trying to feed new rd into the chamber. The only ammo this set up has seen is factory 120 SST and I have had no issues. I Loaded 5 rds of 120 SST into same mag and fired away with no issues. I have seen a few posts about known issues with this ammo but do not recall anyone figuring it out. Is the powder being used the problem for some?
I might try some Double Tap 100gr AB next.. Anyone have any experience with that load?