Well I drilled the ports to 1/8", lubed it up with synthetic 10/40W that was sitting on the bench, and ran two boxes of the 1187fps junk box ammo, weakest I had in hand that failed to cycle the action in the past. Ran like a champ!!! This thing is actually fun to shoot! Recoil is pretty tame even with 12 and 1300 fps ammo. Had a blast shooting hulls ! Got to where on my last box of ammo, I think all but two of the hulls were blasted up onto the bluffs. Practiced my reloads and I think the receiver is cut enough, time to run it!! Thanks for all the info in this thread. Now it's time to see how many rounds to failure of major parts! Sent from my Nexus 5X using Tapatalk