Primers Backing Out When Fired - Problem

[waynewjw]

It's Fun and Challenging

Part of reloading for me, at this early stage is just getting to know the entire process. And I do agree I probably shouldn't have loaded 50 rounds, but after the first 5 with their backed out primers, I thought I had it figured. Not so much, more experimenting to do, and move a bit slower.

So for my next reload of the .270 I will take it up to 60 grains, and yeah probably do the 3 gn increment to see what difference this makes. I also have 2 rounds left of the above loads, and might just start from the highest powder load and shot down and see what the results are, although 2 shots might not provide enough data.

 

[H4831]

Wayne, five shots is the smallest number of shots in a group to have much meaning.
I have always been a geat believer in first finding out if the rifle is shooting OK. I forget what kind of rifle you said you had. I know nothing about plastic stocks, but with wooden stocked rifles, many of them came from the factory, or from some hunter who had been shooting it for years, in great need of barrel bedding.
So, simple first test.
With full power loads and the best rest you can get over sand bags, or better yet, a lead sled, fire five shots, one after the other, with no time for the barrel to cool between shots.
The group should be approximately round, in the order of 1 1/4 to 1 1/2 inches, or smaller. If it is, then carry on with your ammo experimenting.
If the group strings out, in any direction but commonly up, or up at an angle, and the distance is something like 3 1/2 inches or more, from end to end, you might as well stop shooting and have the rifle tweaked. Almost always it is barrel bedding that is required.
No amount of playing with the ammo will fix it, if it is walking the bullets.

 

[waynewjw]

Sako A7

I'm shooting a Sako A7 Stainless, Synthetic stock, free-floating barrel which I purchased new. I'm using a Bushnell 3200 3-9x50 scope. I used factory Federal ammo- $40-55/box and tried out a few different kinds and weights. As with most .270 it really like the Federal with Nosler Accubond in 130 gr. so that is my starting point.

I will try out the 5 shot group next time at the range and see what the results are - circular or string.

 

[Kevan]

I don't know if anyone asked you this yet, but how did the primers feel when you seated them ?
Reason being I dug a box of Federal factory loads in 270 / 130 out of my stash to burn off for reloading.
After firing, I cleaned, sized and trimmed and upon priming the cases, the primers seemed to seat much too easy ( Fed 210 ).
A gentle tap on the bench with the case rim and the primer fell out.
Then I tried a CCI large primer, same thing and all 20 cases would not safely seat a primer.
Normally Fed brass works well for several reloads.

 

[nanuk]

there are several very good articles on resizing.

the important thing to remember is the resizing die is designed to bring the case back to near factory specs.

but upon doing so, it first squeezes the case LONGER, then the shoulder is pushed back.

that is why some suggest blacking the neck and sizing until you just touch the shoulder. Once it is fired in YOUR rifle, you should not need to full length size again for several loads, if using fairly stout loads.

Do some more research. I think the one article that explained it very well was written by Wilson of the Wilson reloading products.

 

[waynewjw]

Seating Primers

I don't know if anyone asked you this yet, but how did the primers feel when you seated them ?
Reason being I dug a box of Federal factory loads in 270 / 130 out of my stash to burn off for reloading.
After firing, I cleaned, sized and trimmed and upon priming the cases, the primers seemed to seat much too easy ( Fed 210 ).
A gentle tap on the bench with the case rim and the primer fell out.
Then I tried a CCI large primer, same thing and all 20 cases would not safely seat a primer.
Normally Fed brass works well for several reloads.

As a newbie, based upon what I've read the primers Fed. 210 seated very well, they fit tightly, I had to apply pressure to load them into the case. None feel out. However I will see what happens on my next load of these cartridges, will post the results.