Primer pops out a bit

madluk18

madluk18

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Peace River AB
This has happened to me a few times,
I reload for a M96 6.5x55 swede.
I use mainly Federal brass with a win primer.
I got 44 grains of RL 22 behind a 140gr Partition.

It shoots just fine. Not the best grouping. I plan on working on it once i get set up again. But I took a deer last weekend and I noticed that the primer had popped out a bit. it didn't fall out or anything. But i figure this can't be amazing. I took a few more shots at a target and it did the same thing. Action opens fine. No signs of pressure. Just wondering what might of caused it

anyone got an idea?
 
It's from light loads, and is seen a lot of mid-range and plinking loads. There isn't enough pressure to slam the case head back against the boltface and reseat the primer.
The problem is, you have probably created a headspace issue by shortening the shoulder to case head distance. Using these cases with full power loads can lead to case separations the same way over-sizeing cases will.
 
44 grains of RL 22 is light in ANY 6.5X55!! You need to bump up your charge a bit. Norma factory ammo [designed for safety in all 6.5x55's] is around 47.5 grains of Norma MRP, which is very similar to RL 22. Eagleye
 
I've created the same problem in .257 Roberts by using handloads FL resized for my Remington and then shooting them in the Ruger.
Not mild loads by any stretch but the primer is backing out if the round gets shot in the Ruger.
Shoot the same load in the Remington and the primer is nice and flat.
 
I think Dogleg hit the nail on the head.
You may be sizeing the brass to short for the shoulder, allowing room in the chamber for your cartridge to move ahead when hit with the fireing pin.
Try sizeing a fired shell just enough that you can feel it tighten on cartridge when you close the bolt, my bet is your primer setback will go away.
 
senior said:
I think Dogleg hit the nail on the head.
You may be sizeing the brass to short for the shoulder, allowing room in the chamber for your cartridge to move ahead when hit with the fireing pin.
Try sizeing a fired shell just enough that you can feel it tighten on cartridge when you close the bolt, my bet is your primer setback will go away.
Click to expand...
Everyone is dancing around the same idea really.
The chamber of your rifle may be a bit long, causing a mild headspace issue. This is likely due to the locking lugs, and their recesses being worn, or set back by firing.
The cure, once you are using full power loads, is to do as Senior suggested, a partial resize. This is close to neck sizing, just bring the die down enough to touch the shoulder, no more, and lock it there.
You can smoke the neck of a fired case with a match, and watch the progression of the die, if you like, but you can probably feel it just as well.
This partial sizing will allow the shoulder to move forward to fill the case, keeping your primer in place.

But you need to fire your cartridges at full power before adjusting the dies, so they can fire form to the chamber.
 
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