had fun, used two guns, a springfield xd9 and a sig sauer p229 2 questions. 1, the clusters of shot when i used the xd9 was all around the center mass/where i was aiming at, but the problem i had was every other shots the brass would get stuck in the chamber. what was i doing wrong that caused that to happen? when my friend used it, it was fine for him. 2. i then switched to the sig, and the cluster of shots says i'm 'jerking' it and 'breaking wrist down or relaxing too soon' what can i do to fix that, and the brass getting stuck wasn't that often w/ the glock, but would happen every few shoots, what can i do to correct this as its pretty fun and i'll go out to the range more often.