Blown Primers going from Fed 210M to Rem 7 1/2?

[Calamity Jake]

I believe you need step back and look at what is happing here.
The only thing you changed---- was the primer--- now you are getting cratering
and pierced primers--- what does that tell you?
That rem. primer has a unplated cup, the federal and cci are plated there fore
a little harder.
The rem may also be a softer material.
swamprat offered you some fed and cci 41's, trade him something for 100 each.
load some test loads with the only change being the primer then go test them
I think you will find that the rem primers are the problem.

By the way---primer appearance is NOT a reliable indicator of pressure

 

[rockchalk06]

Received an update from LRI this afternoon. Bolt is finished and heading to shipping!

 

[Letfreedomring]

Received an update from LRI this afternoon. Bolt is finished and heading to shipping!
View attachment 377688

Awesome! Hopefully it doesn't change your headspace since it looks like they milled the whole bolt face. Anxious to see if it helps the primer problem like it did mine.

 

[rockchalk06]

Awesome! Hopefully it doesn't change your headspace since it looks like they milled the whole bolt face. Anxious to see if it helps the primer problem like it did mine.

From what they claim on the website, it should be very minimal

 

[diggler1833]

.0005 if they're really good (or you're lucky)...but typically a thousandth or two is taken off.

Hopefully it works well for you. LRI has had a lot of happy customers over the years.

 

[rockchalk06]

Problem fixed

 

[rockchalk06]

.0005 if they're really good (or you're lucky)...but typically a thousandth or two is taken off.

Hopefully it works well for you. LRI has had a lot of happy customers over the years.

Was able to do some testing on this today. I kept my original die settings where I was bumping the shoulders back exactly 001". Fired brass after the work was .0015" to .002". I'm completely ok with this.

 

[Jcann]

Problem fixed
View attachment 380820

I knew Chad would take care of you

 

[rockchalk06]

I knew Chad would take care of you

Work aside, the whole start to finish was pretty cool how they kept me in the loop. It took a bit of time, but quality work does. Juice was definitely worth the squeeze