Stumped! Chamber pressure

[rcol317]

Thanks Jim, The cam issue may be the problem, when I chamber a spent piece of brass there seems to be a hangup on the bolt lift to eject it. But does that explain the case stuck on the chamber? It takes a pretty hard tap on the ram rod to get it out. Sounds like it's something I'll need to have Cooper resolve.

[BountyHunter]

carbon rings in chamber throat will cause pressure issues also

[Freebore]

rcol317

I have the same issue with a rebarreld BLR in 7mm-08 I had actually shot the barrel out that's how much I shot that rifle. The gunsmith is very well known in benchrest circles. The barrel is a Krieger. He could not explain it either.

Lapua, W-W, R-P brass all stick with very light loads. Had chamber repolished still the same, sticky brass.

I had some old nickel plated Federal brass laying around. I Can Not stick these cases even when at max+. So that is the brass I use.

I'd be real interested in your info if you get yours figured out.

[rcol317]

Thanks for all the input. Called Cooper today and was again pleased with the customer service but a little surprised by the response. After discussion their response was the gun probably will only shoot light loads and you can't push it. I disagreed and asked what load they used to test fire. They gave me the information and I loaded it as suggested. First load no problem, good, second and third stuck brass. I've shipped the rifle back to cooper and it will be interesting to see what comes of it. I hope they don't go with minimum loads and tell me thats what I'm stuck with. I'm not sure about industry standards but I hope it isn't load as low pressure as possible.

[cowboy]

You will soon find out what kind of company Cooper is - shooting min. loads would not fly very far with me. A person shouldn't have to even put up or deal with something like this but I guess all companies have something slip out the door that is not normal. The good companies take care of any problems. We'll see.

Good Luck.

[kjcpoint]

I sent 2- 6.5x284 rifles back to cooper for the same problem. Cooper said to shoot mild loads and the chamber was a 6.5x284 win and not norma? Go figure, the only difference I could find in Dave Kiffs reamer prints was the Free Bore. Also sent them a 22 250AI for the same problem?

[boomtube]

Maybe your rifle has a too tight neck or short chamber that fails to release the bullet properly.