35 Rem primers backing out

MadDog

MadDog

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So I refinished an old Stevens model 425 in 35 Rem (only the wood) and took it to the range today. Never shot the gun before so I was glad to see it fired and racked another shell smoothly.

When I was finished about the only thing I had to do is shorten my tang sight stem as it's on paper but I couldn't get the bullet to hit any lower due to the tang sight stem being to high.

Anyways, picking up my brass I noticed the primers are backed out on all of them, not much, only .015" but I'm wondering if I should be worried at all? Right now I don't think it's a big deal but would like to hear from some guys that have dealt with backed out primers before.

I was shooting Remington 150 gr factory pointed soft point bullets. There is no case seperation or cracks in the necks of the spent cases. Spent shell casing neck measures .334" so it's not even blowing out that much from loaded ammo.

What say you?

IohpTE1.jpg
 
I suffer the same thing, it's a known issue with low pressure rounds.
I set my barrel up with the absolute minimum case clearance and I still get it, and when I say minimum, I can't close on a go gauge but I can close on factory ammo with a slight hint of resistance, primers still back out........
 
Probably low pressure loads. Not enough pressure to push the case back against the bolt face. I have two Lebel rifles this happens to with cast loads. About a ten thousand. Accuracy wise it is the best load. Put the powder up accuracy goes down until to max loads then it's almost as good as the low pressure load. I noticed my contender doing this also with cases FL sized , from another gun. 221 Fireball with cast bullets. I wouldn't worry too much about it. Try a little more powder. One of the Lebels a difference of 0.6 of IMR 4198 showed primers where flush with case head.
 
Can't try a little more powder because I'm shooting factory loads.

I just figured I'd put this in the reloading section because it seems like something a reloader might encounter.

I do reload, just not for this cartridge.

I could move up to the Hornady Leverevolution which seemed alot hotter load when shooting it out of my Savage 170 in the same caliber, might improve things actually but the gun was made in 1910 so I tried to steer clear of the hotter Hornady loads.
 
all I do to try and combat this when shooting lighter loads and or cast is to lightly jamb the bullets so that the case stays against the bolt face, it's working for me so far, the .35 is a very low pressure round and this has been a known issue for a long time, but I will side with you that it is a little disheartening to inspect the brass after firing it and seeing almost half the thickness of the primer exposed out the back end.
The brass itself is thin, a good strong firing firing pin is enough to set the shoulder back upon firing, a slightly weaker firing spring, yet still stron enough to get constant fired primers can be a fly by night repair, but if the rifle shoots when the trigger is pulled as is just go with it....you can always knock the bullets out a bit with a kintic hammer and seat them so they lightly jam
 
MadDog said:
Can't try a little more powder because I'm shooting factory loads.

I just figured I'd put this in the reloading section because it seems like something a reloader might encounter.

I do reload, just not for this cartridge.

I could move up to the Hornady Leverevolution which seemed alot hotter load when shooting it out of my Savage 170 in the same caliber, might improve things actually but the gun was made in 1910 so I tried to steer clear of the hotter Hornady loads.
Click to expand...

Have you checked the headspace on it? The case is not being pushed back to seat the primer again but it may be due to the headspace being long and then the case moves forward with the primer strike, the case then expands to fill and the primer blown out the back a bit.

If this is the case you may be able to load light loads and fire form then size it without pushing the shoulder all the way back to make cases that are safe.
 
I've used small O-rings around the front of the rim to fix this in 303Brit rifles with generous chambers. O-ring holds the case against the boltface , and then the brass is fire-formed for subsequent loadings.
 
jethunter said:
I've used small O-rings around the front of the rim to fix this in 303Brit rifles with generous chambers. O-ring holds the case against the boltface , and then the brass is fire-formed for subsequent loadings.
Click to expand...

This would not work with a rimless case
 
My 30-30 Winchester 94 has the primers back out all the time with factory ammo or reloads and its rated at 38,000 cup or 42,000 psi. And your .35 Remington is rated at a max chamber pressure of 35,000 psi and 7,000 psi "LOWER" than a 30-30.

The 35 Remington's chamber pressure is not great enough to make the brass case stretch and contact the bolt face. "BUT" the chamber pressure is high enough to push the primer to the rear until it contacts the bolt face. This also happens with workup loads starting at the suggested start loads with much higher pressure cartridges.

The amount the primer protrudes after firing is your head clearance or the amount of "air space" between the rear of the case and the bolt face. And with a factory loaded cartridge the head clearance tells you how much shorter to the case shoulder it is in relation to the chambers shoulder. And with reloads it tells you you are pushing the case shoulder back too far depending on the type rifle.

Bottom line, having the primers back out with low pressure cartridges is normal and nothing to worry about.

HK76WCp.jpg


Below on the left shows how far a .303 British Enfield rifle primers back out on a worn rifle with the headspace over maximum. This rifle was still used to fire reduced loads with cast bullets safely, and no case head separations.

MfVUt3f.jpg
 
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