Bolt Face marks?

[savman12]

Anyone seen this before? I've had issues with Nosler brass and loose primer pockets. This safe or ok?


https://i.ibb.co/2gt0C3H/456.jpg


https://i.ibb.co/x5sZmk1/123.jpghttps://ibb.co/Fgwky4C
https://ibb.co/q1n60SN

[mikeinco]

it is safe but really sucks
loads to hot for the brass and chamber
the loose primer leaks gas and burns the face.
it may simply be that the chamber is too large for the lads you want to shoot.
the brass too soft load too hot

[savman12]

Nosler brass appears to be garbage. I do starting to mid loads and primer pockets become loose after 2-3 firings. Some pieces get a little more.

[mikeinco]

i have shot nosler and not had that issue.
load data is not a bible..it is a guideline...if you are losing primer pockets and your boltface looks like that.
you are most likely TOO HOT


Nosler brass appears to be garbage. I do starting to mid loads and primer pockets become loose after 2-3 firings. Some pieces get a little more.

[mikeinco]

WHAT IS YOUR LOAD....all data bbl length oal bullet etc

[savman12]

30-06, 22" barrel

53-55gr of IMR 4350 with Accubond 180gr

It's been through the ringer with different powders and load testing.

Can I replace just the bolt face?

[Kev1Doggy]

Why does the bolt face have end mill machine marks on it??

[charlie b]

Yes you can easily replace the bolt face, but, you need to check headspace just to be on the safe side.

You need to find out the cause. By some new cases. Take 5 and load as normal to see how long they last. Take another 5 and reduce the load a bit and see how long they last.

[mikeinco]

what is your OAL, WHAT IS CASE VOL ?


30-06, 22" barrel

53-55gr of IMR 4350 with Accubond 180gr

It's been through the ringer with different powders and load testing.

Can I replace just the bolt face?

[savman12]

what is your OAL, WHAT IS CASE VOL ?

I've been .20 - .100 off the lands which makes OAL vary depending on my bullet. Recently I've been using 3.330" w/ Nosler Accubond since I have two rifles with same catridge.

I got Remington and Winchester brass with multiple loads of similar charges and the primer pockets are still very tight.

I've never measured case volume.

[mikeinco]

the pressure can easily be 59kpsi. almost max
my guess is a large chamber at the base.
what is the dia of once fired brass up 0.2 from the base

[mikeinco]

manufactures case volume DIFFERS BIG TIME.
YOU CANNOT ASSUME A LOAD IN WIN BRASS IS SAFE IN NORMA BRASS

I've been .20 - .100 off the lands which makes OAL vary depending on my bullet. Recently I've been using 3.330" w/ Nosler Accubond since I have two rifles with same catridge.

I got Remington and Winchester brass with multiple loads of similar charges and the primer pockets are still very tight.

I've never measured case volume.

[Fuj']

Why does the bolt face have end mill machine marks on it??

After you mentioned that, I captured the first pic and enhanced it. It's swipe marks
from opening and closing the bolt. Savage probably could have done a better heat
treat. I've seen this on Argentine mil surplus Mauser bolts.

[savman12]

manufactures case volume DIFFERS BIG TIME.
YOU CANNOT ASSUME A LOAD IN WIN BRASS IS SAFE IN NORMA BRASS

I know this and what best practice is. I'm just saying that I had bad experiences with Nosler brass. Primer pockets become bad quickly regardless of load. This has been reported on numerous sites. Even some brand new pieces of Nosler brass don't feel as tight as Win, Rem, etc with primer pockets. I had a few that were questionable without any firings.

Also, just recently, I had 5 rounds not sized correctly in my last box causing a tight bolt close. Resized them and it was all good. I would assume the shoulder had issues.

[savman12]

After you mentioned that, I captured the first pic and enhanced it. It's swipe marks
from opening and closing the bolt. Savage probably could have done a better heat
treat. I've seen this on Argentine mil surplus Mauser bolts.

The weird swirl marks on the outer edge is odd. My 300 Win 116 doesn't have that at all.

[sharpshooter]

They are endmill tracks......that's the way they were cut way back in the dark days. Most probably that rifle has an E or F prefix serial #.

[mikeinco]

very poor quality machine work.
i have used an end mill to resurface a savage bolt head....no marks like that...nice even flat surface.



They are endmill tracks......that's the way they were cut way back in the dark days. Most probably that rifle has an E or F prefix serial #.

[savman12]

It's a 111 with an H serial number. Got it back around 2014.

[Robinhood]

Nosler brass can be crap. I had some 260 that did this. Mild loads. I will never buy Nosler brass again.

[Robinhood]

my guess is a large chamber at the base.


Smartest thing you have said this whole thread.

Sharpshooter. Was Savage attempting to remove the dish in the boltface? Why else would they use such relatively expensive extra operation.