30-30 popping primers

G

g-manz35

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I've got a Savage 340a bolt action 30-30 and I have been loading a few rounds for it. Every cartrige comes out the same reguardless of the load. The primer pops out a bit. They are flattened a bit, but not a lot. Factory ammo does it also. I can't get very good speed out of this gun and want to go over max with it, but it's making me nervous. It is showing no other pressure signs and the cases eject easily. Do I have a head space problem? I don't really have a use for it and will probably sell it and I don't want to sell a gun that is not functioning properly.

G
 
How much are the primers protruding?
Might be headspace, also might be too little pressure.
 
tiriaq said:
How much are the primers protruding?
Might be headspace, also might be too little pressure.
Click to expand...

I measured with a caliper. They protrude by .015"-.02" . I was thinking that low pressure may be the problem seing as my velocity was 200 fps short of the published numbers. I don't like going over max and when I do I do it very carefully. I'm at my max load with 150 gr Sierra BTSP and BLC2 and I'm gettingg 2100 fps so I want to load them up a bit hotter.

Thnaks. G
 
Fifteen - twenty thou. is a lot, if it is a headspace issue.
I wonder if you could try the o-ring trick to hold the casehead against the boltface for first firing, and then necksize.
Headspace could be adjusted, but sights wouldn't be on top any more.
 
Try neck sizing fired cases from that rifle. This way you will be headspacing on the shoulder rather than the rim and MAYBE get better results. It does sound like head space to me.
 
iceman2 said:
Try neck sizing fired cases from that rifle. This way you will be headspacing on the shoulder rather than the rim and MAYBE get better results. It does sound like head space to me.
Click to expand...

Its to early in the game for this, first your going to have to get the shoulder to jump forward so that the rim of the case is tight to the boltface, then you can either necksize or lift your full length sizing die so that it doesn't bump the shoulder back.

If your not familiar with the Oring meathod of holding the case tight to the boltface then consider the following, go back to you mid range powder load and seat the bullets long so that they contact the rifling, long enough that there is a good amount of resistance on the bolt handle when closing the bolt. Fire off these rounds, the bullet will hold the case tight to the boltface and your sholder will move forward to match the chamber, then from here just neck size and load as per normal. Keep these brass seperate and marked as they will no longer fit another chamber.

Another option is to have the barrel set back excactly one turn of the threads and the chamber recut, this way your fixed sights are still usuable.
 
yodave said:
Its to early in the game for this, first your going to have to get the shoulder to jump forward so that the rim of the case is tight to the boltface, then you can either necksize or lift your full length sizing die so that it doesn't bump the shoulder back.

If your not familiar with the Oring meathod of holding the case tight to the boltface then consider the following, go back to you mid range powder load and seat the bullets long so that they contact the rifling, long enough that there is a good amount of resistance on the bolt handle when closing the bolt. Fire off these rounds, the bullet will hold the case tight to the boltface and your sholder will move forward to match the chamber, then from here just neck size and load as per normal. Keep these brass seperate and marked as they will no longer fit another chamber.

Another option is to have the barrel set back excactly one turn of the threads and the chamber recut, this way your fixed sights are still usuable.
Click to expand...

Talked to the local semi retired gun smith today. Basicly came to the same conclusion that you listed above.

Thank you all. G
 
Backed out primers with a 30-30 is very, very common.

Your loads are low pressure and they are not seating the case back onto the bolt face when fired. A rough chamber - common on some older rifles - makes
the "problem" worse. The firing pin strike moves the case forward in the chamber and when the case expands during firing the case wall grip the chamber walls leaving a small gap between the bolt face and case head. If there is not enough thrust to move the case rearwards in the chamber the primers will pop out a bit.

Try cleaning your chamber with JB Bore paste or similar fine polish.
 
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