So I attempted to replace the end seal and reassemble my 1994 Crosman 1077 pellet rifle.
I got off one shot, then realized I left the Allen wrench for adjusting the site inside. I came back out, lined up my second shot, finger on the trigger and...
Somehow it started leaking again. I tried some in situ adjustments of the guide collar and then had a hard time getting the cylinder to pierce. Finally I figured that maybe I just need a new piercing pin. It is, however, possible that the gun is leaking at the plug assembly and tube junction.
So I'm waiting on the new part. In the meantime the replacement 1077 arrived and my brother and I spent about an hour shooting cans and targets. It was great fun.
So the jury remains out on whether I can resuscitate this gun. I'm at the point where I don't want to spend anymore to fix it because I'm halfway to the purchase of a brand new one. I'm also running out of time. So we'll see if I have anything further to report.