6.5 PRC over pressure question

[songdog204]

Shot from a bolt action, correct?

yes

 

[Legionnaire]

I've seen that lip before in another thread, I think on another site. Trying to find it ...

 

[Greyfox]

Taking a close look at the lip on the case, I have had that occur with my 270WSM. Usually the ridge would be a bit higher up the case where the case head webbing starts to thin out. This could very well be the problem with the case. In my case it was the initial stage of a case separation. Continue to use that case and you may see a crack/ or even a complete separation at that spot. IMO.

 

[coop2564]

I'll do a little more testing tonight. I can't put a primer back into it because the pocket is so loose. Might try hot glue in each to keep the comparison as close as possible

thinking I'm gonna have to measure case capacity on all of them and determine which ones are good and which ones to toss if coops theory is right

Glue is fine just make sure you tare/zero the scale for each case and it takes the weight of case out of picture and just gives the water volume weight.

 

[okie man]

Does that case weigh a significant amount different than others

 

[songdog204]

Does that case weigh a significant amount different than others

0.7 grains the pics are on Page 1 as well

 

[milboltnut]

trying to figure out why you want to use Retumbo?

 

[okie man]

0.7 grains the pics are on Page 1 as well

I'd squeeze that case and another one that didnt show issues and see if it was a soft case. Nosler 6.5 prc brass isn't premium and I'm sure there's more too blems that color spots.

 

[Bob Wright]

Do you have a carbon ring build up in your chamber at the neck area?
Also, if you have a tight chamber ream, do you know what the neck clearance is?

 

[milboltnut]

the guy only had one case with a blown primer and case bulge. If he had numerous cases then I would steer him to other than defective case.

 

[songdog204]

Do you have a carbon ring build up in your chamber at the neck area?
Also, if you have a tight chamber ream, do you know what the neck clearance is?

Bob, I don't know about the neck clearance. It's a Seekins Havak Bravo. I don't have a bore scope to see if there's carbon build up.

 

[milboltnut]

Bob, I don't know about the neck clearance. It's a Seekins Havak Bravo. I don't have a bore scope to see if there's carbon build up.

If you have a carbon ring the brass will have a hard time chambering, trim back to maximum trim length, and just bump the shoulder a couple of thousands. If you have to bump back more than a couple of thousands, then the carbon ring is interfering. Scrub the throat to remove the ring

 

[Bob Wright]

Bob, I don't know about the neck clearance. It's a Seekins Havak Bravo. I don't have a bore scope to see if there's carbon build up.

A Teslong bore scope is inexpensive and might fit in your budget. Handy tool for inspecting your cleaning sessions/carbon ring in neck of chamber.
Can you easily drop a new bullet into spent brass? Reason I ask is I had some bad experiences with a tight neck chamber ream blowing out brass like yours. Neck turning fixed it. I went with .004 clearance. You might visit a good gun smith that can inspect the above.

 

[okie man]

Before I got a borescope I'd buy some good brass. I know it's hard too find but I'd rather not blow my eye out when the next case fully ruptured