Neck size or body size first?

[stifffingers]

interesting discussion. My most accurate reloads are by using the redding type 's' die without a bushing followed by the Lee collet die, which also deprimes the case.

Seems to me you all do a lot of work sizing everything just right to your liking. Why not just buy a custom dye that does everything at once. Why use an expander, your bullet does that for you when you shoot it. A custom dye will size the brass properly, bump the shoulder, deprime, and neck size all at the same time. Send three fired cases to your favorite gunsmith and he will sell you a custom dye that he has in stock....While we are on the subject, I've read some people use a carbide button on their sizing dye that is a bushing dye. Why would you size a neck down on the up stroke of the press and then expand it back on the down stroke. The only use for those buttons are to straiten out bent necks from falling on concrete, without a bushing in the dye. That is if you don't have an expander dye and mandrel. Put the buttons in the box your dyes came in. You may need it some year.

 

[Grimstod]

People still neck size?

 

[jimbires]

Can you please 'splain how that happens - I cannot, for the life of me, picture how that is possible?? It is more likely that neck sizing second, could effect the body (but I doubt that too).

well John , i'm waiting for another reply . did I use to big of words when I tried to splain it top ya , or were you just trying to turn this thread into a dick measuring contest ?

 

[divingin]

While we are on the subject, I've read some people use a carbide button on their sizing dye that is a bushing dye. Why would you size a neck down on the up stroke of the press and then expand it back on the down stroke.

Has to do with variations in neck thickness (not that I do this, but just an explanation): When you run the neck into a bushing, the outside of the neck is formed to whatever the bushing diameter is, discounting any springback. Any variations in neck thickness gets moved to the neck interior. Running an expander mandrel or button through the mouth makes the case neck interior round, and moves any thickness variation to the outside, where it will have less effect on bullet pull.

 

[stifffingers]

Has to do with variations in neck thickness (not that I do this, but just an explanation): When you run the neck into a bushing, the outside of the neck is formed to whatever the bushing diameter is, discounting any springback. Any variations in neck thickness gets moved to the neck interior. Running an expander mandrel or button through the mouth makes the case neck interior round, and moves any thickness variation to the outside, where it will have less effect on bullet pull.

Okay, but how would you vary neck tension? Would you need to have a selection of expanders? Another interesting factoid. Did you know there is no springback on a properly annealed case neck. To get a .258 neck you have to use a .259 bushing. Before you ask where I got that from, check out the Annealing Made Perfect website FAQ.

 

[Sniper338]

Just FL neck bushing size everytime... its been prooven better for a good while now... see erik cortinas youtube video posted above... i was going to post the same video..