Personally I love mine!! except what it cost me to do a proper conversion to 922r compliant lol... the only thing I am waiting on is Scalarworks aimpoint T-2 mount combo to get back instock...
I started to up my loads one day to see how hot I could get them!! After a while the flutes in the MP5 chamber started to really chew up the brass so I switched to the Sweedish K eventually got to the point that the primers where coming out like little crunched up beer cans destroying the primer...