Over pressure?

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My Savage does that once every 10-15 rounds with reloads and factory. My reloads are on the low end of the Speer manual, and never look like that after shooting the same batch in my AR.
 

swampratt

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Federal primers are softer cup than CCI and will flow or crater more and flatten much more.
Those primers do not look too bad really You may have a loose fitting firing pin.
I have some dandy loads that make a primer look much flatter than yours.
Primers are not the end all pressure indicator.
I never go by primer unless it is pierced and I have loaded brass to the point of piercing primers just too see what max really was for different primers.
It was a test in .223 with CCI 400 cci 450 and cci 550 primers and the CCI 400 pierced and cratered before the 550 and the 450 looked fine and dandy.

I do not condone doing it.
 

dennishoddy

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View attachment 133063 These three brass were all loaded with the same load .243win 43 grains of H4350 they all look different to me for some reason
What I saw was when approaching maximum loads, the center round was normal looking. The other two are flattened with no rounded edges.
There is a reason that reloading manuals list what brass they are using in load development. Brass does make a difference and this is an example of it.
It's always recommended to sort brass and use the same brand when building a new load.
 

lasher

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What I saw was when approaching maximum loads, the center round was normal looking. The other two are flattened with no rounded edges.
There is a reason that reloading manuals list what brass they are using in load development. Brass does make a difference and this is an example of it.
It's always recommended to sort brass and use the same brand when building a new load.

agreed, i'd back that load off 1gr and load up a ladder in .3gr increments, choose the one that shoots best
 

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