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Excessive primer dimpling with CCI 450s.

Upon confirmation with my wife, she noted that the primers used in her 17 hornet loads are from the same case and that they in fact crater similarly with her loads. Perhaps it is a soft lot of primers?
If their CCI small rifle they will flatten etc at a very low to medium charge... I use them in my AR and it flattens them but any other primer is fine... It will be fine , I have a savage that does the same... Alot of factory guns do it... I personally wouldn't worry about it...
 
You WILL eventually need to adjust protrusion and replace the firing pin spring, and it's wise to keep a replacement assembly in your range box. Also PTG makes a nice bolt head that corrects the dimpling, Brownells used to sell them.
 
Everybody blames the firing pin and the bolt head needs to be bushed!!! SOP!! Throw more $$$ at it. That'l fix it! :rolleyes:


Owning a "few" Savage rifles, I look at it a different way. KISS!!
Where did the brass come from?
New, used? Fire formed to THAT chamber?
Looks to me like maybe the head space is off "just a little". (more of a brass issue than chamber issue. remember, it's a Savage)
The brass can move in the chamber, firing pin hits the primer and pushes the case forward in the chamber, primer goes BANG and tries to back out of the pocket "a bit", gets slammed back onto the firing pin and gets cratered.
Once brass is formed to "that chamber", when resizing, make sure you don't push the shoulders back too far and end up with the same situation again. ;)
 
Everybody blames the firing pin and the bolt head needs to be bushed!!! SOP!! Throw more $$$ at it. That'l fix it! :rolleyes:


Owning a "few" Savage rifles, I look at it a different way. KISS!!
Where did the brass come from?
New, used? Fire formed to THAT chamber?
Looks to me like maybe the head space is off "just a little". (more of a brass issue than chamber issue. remember, it's a Savage)
The brass can move in the chamber, firing pin hits the primer and pushes the case forward in the chamber, primer goes BANG and tries to back out of the pocket "a bit", gets slammed back onto the firing pin and gets cratered.
Once brass is formed to "that chamber", when resizing, make sure you don't push the shoulders back too far and end up with the same situation again. ;)
1. Brass is twice fired. Purchased new( Alpha munitions), and only every fired in this rifle.
2. Barrel was properly installed, and headspace.
3. Cases are sized full length, shoulders are set back .002.
 
If you head spaced your barrel several thousandths longer than prior owner did on his rig - the 'slop', combined with being a stiff load, will enable the brass to slap the face of the bolt - giving the impression of a hotter round.
 
Ditto! I have had one 700 and two Savages Model 12 BRs done. The problem will only get worst until your favorite load blows a primer.
I just did a 308 project with a brand new Remington 700. I did all of the usual improvements, ie trued the receiver threads and face, lapped the lugs, trued the bolt face, and sleeved the rear of the bolt,

it cratered primers with any load, that Irving pin to hole fit was way too much. The handle was not timed correctly, you actually had to lower it slightly to get the bolt to come back Upon extraction. The factory spring was all wadded up in the bolt ID.

Rather than mess with all of that, I just called Carlsbad and got a complete PTG Bolt assembly. All problems solved.
.
 
I just did a 308 project with a brand new Remington 700. I did all of the usual improvements, ie trued the receiver threads and face, lapped the lugs, trued the bolt face, and sleeved the rear of the bolt,

it cratered primers with any load, that Irving pin to hole fit was way too much. The handle was not timed correctly, you actually had to lower it slightly to get the bolt to come back Upon extraction. The factory spring was all wadded up in the bolt ID.

Rather than mess with all of that, I just called Carlsbad and got a complete PTG Bolt assembly. All problems solved.
.
Ditto the Rem 700. My 308 does the same. Primers are not always a good guide for pressure, especially cratering. If you don't normally crater and then crater then you have pressure.
 

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