Neck tension on cases of pulled rounds?

[Pfiddy]

So,I'm pretty new to precision and handloading. I decided to pull a batch of my 175s and reuse the components. When reloading them I noticed it was much easier to seat the bullet, due to decreased tension in the neck. The projectile would still not shift with some significant pressure on the proj, but how much will this effect pressure and hence velocity from these cases ?

Do I need to neck size every one? Does it effect it all that much being as it's still the same amount of pressure from bolt to muzzle, even if it varies a tiny bit inside the case?

I'm to a 1/4 min shooter even if my rifle is, so are these acceptable rounds for practice, closer range, opinions are appreciated. Thanks.

 

[High Binder]

You need to have neck tension of .002-.003" so check that and re-size if needed.

 

[918v]

U need to neck size them.

Brass is like rubber but it springs back a lot less.

 

[Drifter™]

Load 'em and mark the brass with a Sharpie so that you know that they're informal rounds. Set 'em aside for fouling a clean barrel, offhand practice, letting friends shoot, etc. This will also allow you to see any difference versus your other loaded rounds.

 

[leid]

OP,
IMO, resizing the case neck of a "Mexican Match" (MM) cartridge can do more than uniform neck tension. Depending on the caliber being pulled down/type bullet puller used/amount of force applied, the case neck can be pulled out of alignment when the original bullet is pulled. Seating a bullet in a crooked case neck will result in excess bullet run out/reduced accuracy. Resizing the case neck before seating the bullet will result in more consistent MV/ES/SD all while controlling bullet run out. These are some of the most critical variables we as handloaders need to control in order to produce an accurate loading. .02

Edit: Just to make sure you are aware of the decades-old gouge on pulling down sealed/crimped factory cartridges: Seating the original bullet just a few 0.001s deeper will break the seal formed by the asphaltum bullet sealer/bullet crimp making the bullet much easier to pull. And using minimum force to pull the bullet will result in better case & pulled bullet condition.

 

[LawnMM]

Definitely neck size after pulling a bullet