Joefrazell
Well-Known Member
- Joined
- Apr 29, 2017
- Messages
- 1,588
chamber cast would be the first step in my eyeswhat are the steps that someone would take to diagnose an oversized chamber? is it just off the fired brass?
I've used Barnes brass, Winchester and federal. All doing the same thing[/QUOTE
all of this is brass brand new from a bag or from factory ammo recycled??
I would make a chamber mold to see what is going on in there. 30-06 are not hard on brass, I have some that have been reloaded 12 times.Hey everyone, I bought a bergera b14 Hunter in 30-06 for my wife about a year ago. Ive shot it a bit and just started reloading for it about 6 months ago. I started noticing some real strange cracks right where a typical case head separation happens. Its basically like a start to one. Now this is after only 1 reload on the brass. I've tried 3 different brass manufacturer's and all do the same. So I starting really looking at the factory brass that had only been fired with a factory load and noticed a very very faint cracking in the same area. It's very hard to see but it is there and appears to be a start of a separation. So I went ahead and have the rifle to my gunsmithing just to check the headspace real quick. It was right on the money. He said to send it in and see what they say. So I did. A month later I just got the rifle back with a clean bill of health and they said they cleaned and lubed it, shot it 3 times and everything is ok. So i just got back from shooting it and it's still doing the same thing. I also noticed that it's got a pretty noticable bulge right in that area towards the bottom of the case. ( Sorry not sure what that area is called). I measured it a s it's .006" of a bulge. My question is is this excessive and why I'm getting the issue? I'm going to call bergera tomorrow and see what they say but wanted to be informed by those who know more. Thank you
Looks to me like the chamber is oversized and causing the case to over-expand, bulge, and crack. If you're seeing 0.006 of expansion compared to sized brass, that's huge and the problem is the chamber.