SS and 486 -
Yes I experienced some rear trunnion slamming, but that wasn't until after it finally functioned. That can be be tamed with a buffer, adjusting spring length, BC weight, etc. But it must live before it can be tamed. In other words, it must complete it's function first. That's the best I know how to explain it; not intended as a rude nor know-it-all rebuttal. By golly I'm just learning as I go!