Will neck tension affect chamber pressure?

[8mmFMJ]

I measured the chamber of a bolt action by pulling up the die and not completely resizing the necks of the brass case. Then I popped a projectile (same ones I will be using) into the brass case and slid to bolt in to measure the internal length. This way I can pull off the lands little by little and check accuracy to find the best OAL for this round.


My problem: I left the die up, and reloaded a few rounds. The neck is tight enough to hold all of the bullets in place even if I yank on them by hand. About only the top half of the neck got resized. If I hand load them in a bolt action, are they ok to shoot? See any issues?

The rounds are too big to use my hammer puller, and too expensive to trash.

Thank you.


***all the rounds cycle in the bolt gun

[stand125]

i don't really know if it will effect it, But when I reload in the field for my bolt action 223 I resize with the LEE CLASSIC LOADER and then finish the rest of the process with my hand press and dies. The CLASSIC LOADER only neck sizes and works great.

[Paul_R]

Yes it will but I don't think it really is an issue for what you're talking about. What you're describing is a common practice in black powder cartridge and schuetzen rifles. If anything your chamber pressures are going to be lower. Which usually means dirty with unburnt powder.

[Bill Steele]

It will effect consistency of burn to some degree, especially if you have a jump. It won't change peak pressures enough to matter from a safety standpoint.

Jamming into the lands can change peak pressures quite a bit, although I think that is also largely an academic exercise as I have never heard of anyone blowing up their gun because they jammed, versus jumped.

[8mmFMJ]

Thank you everyone

[pacrat]

Choot em