The pistol ran fine before?I just spent an hour+ going through it. Some more information:
This happens with unfired rounds. It isn't just the not going into battery issue. When you chamber a new round and then try to manipulate the slide to eject it, you have to put the muzzle against something very hard and whack it with your hand on the back of the grip to get it to eject. I really hate doing this with a 1911 with a live round in the chamber!
I took the gun apart just now. A fresh, out of the box Federal 230 gr HST (actually any one of the 50 in the box) will not drop into the chamber. The rounds stop about 1/4 inch or so from going in all the way. The same rounds drop in (clunk) in a Glock 21 barrel and drop out just by turning the barrel breech down.
I got out the biggest bore brush I have and some Hoppe's and worked it from the breech end, concentrating on the chamber. I then used a clean patch and it came out black. It hasn't been fired in several years and was thoroughly cleaned after the last trip and has been periodically cleaned and lubed since then. This is a Kimber Custom TLE-RL II.
I couldn't locate the Wilson Combat chamber brush, but will phone them tomorrow. I did phone Kimber and spoke to an engineer and he said it was probably the recoil spring. How the recoil spring stops a round from going into the chamber when it is out of the gun, mystified him. So much for Kimber engineering.
Just to be certain, I miked 3 different brands of factory loaded cases and they all came out at .472. The only ones that would more or less drop in and come out (sort of) by hand were some Underwood loads. I don't have the SAAMI specs in front of me, but judging by how easily they all go in and out of the Glock 21 barrel, I don't think that diameter is out of spec. I'm also wondering now about the headspace on this barrel. I guess I need either a headspace gauge, or dig around and find some old hardball to see if anything has changed. I'll also do some checking on the various rounds OAL.
Oh well. As Mrs OldChap always says, "It'll all come out in the wash." Thanks for all the thoughts, suggestions and ideas. I appreciate all of you. I'm sure I have missed something!
Can you think of anything different you've done to the pistol? Even something you might not feel would have anything to do with the problems your having. It started having problems after being taken down and reassembled for cleaning?