Thread: Neck tension

For ultimate long range consistency think case neck annealing

Originally Posted by LJP

For ultimate long range consistency think case neck annealing

Every palma/TR shooter I have talked to so far, doesnt anneal, but they only neck about 1/4 to 1/3 of the neck with a bushing die so work hardening is minimal, or use the Lee neck die, good scores either way.

regards

Originally Posted by steven

Every palma/TR shooter I have talked to so far, doesnt anneal, but they only neck about 1/4 to 1/3 of the neck with a bushing die so work hardening is minimal, or use the Lee neck die, good scores either way.

regards

Wouldn't that increase the odds of encountering bad run out issues with only a fraction of the projectile being held in a parallel within the case neck? I've heard of guys doing this, but its never made absolute sense to me?

Originally Posted by kimjon

Wouldn't that increase the odds of encountering bad run out issues with only a fraction of the projectile being held in a parallel within the case neck? I've heard of guys doing this, but its never made absolute sense to me?

Wouldn't the un sized portion hold the round perfectly concentric(in a tight neck chamber) and the projectile held straight in the bore?

Would also mean effectively a lot less neck tension.

Originally Posted by veitnamcam

Wouldn't the un sized portion hold the round perfectly concentric(in a tight neck chamber) and the projectile held straight in the bore?

Would also mean effectively a lot less neck tension.

I can see the unsized section working to hold the brass concentric in the chamber, that makes perfect sense to me.

But the 1/4 sized neck (bearing surface) on the case is all that really touches the projectile if the bullet isn't jam seated. its just cantilevered out there in free bore and this could cause issues with concentricity?

You often hear of wild-cats like the 7mm-300WSM when there is already a 7mmWSM, so it seams pointless...but its done to get the longer neck, which aids in concentricity. It comes at a slight cost in capacity (internal capacity is lost by having the longer neck, so its a little slower than the true 7mmWSM), but some consider it important for accuracy.

Originally Posted by kimjon

I can see the unsized section working to hold the brass concentric in the chamber, that makes perfect sense to me.

But the 1/4 sized neck (bearing surface) on the case is all that really touches the projectile if the bullet isn't jam seated. its just cantilevered out there in free bore and this could cause issues with concentricity?

You often hear of wild-cats like the 7mm-300WSM when there is already a 7mmWSM, so it seams pointless...but its done to get the longer neck, which aids in concentricity. It comes at a slight cost in capacity (internal capacity is lost by having the longer neck, so its a little slower than the true 7mmWSM), but some consider it important for accuracy.

Yeah mate on the money.

And the longer neck aids throat life some what also.

The little it lets down in speed if any depending is nothing

Originally Posted by veitnamcam

Wouldn't the un sized portion hold the round perfectly concentric(in a tight neck chamber) and the projectile held straight in the bore?

Would also mean effectively a lot less neck tension.

Redding bushing dies leave about 1mm on there type s dies that don't size the neck to line it up in the chamber also
Compertition bushing dies let you adjust the amount of the neck you size so you can play with it if your that way inclined.

What's your method Mr Veitnamcam?