How much of the neck to size?

bailey1474 · #1 05-02-2006, 03:22 PM

I'm going to load up some once fired stuff in my 6-250 and was wondering how much of the neck I should size w/my Redding bushing neck die. Should I size the entire neck, 1/2 of the neck or something else? I'll have about .0015 neck tension if that matters.

Thanks,
B.J.

winmagman · #2 05-02-2006, 03:34 PM

Bill
I'm working on setting up a 6.5 wssm that I will be using Redding FL bushing dies for. I will be setting up to size the entire neck and bump the shoulder back .001-.002. Not sure that's the "right" way to do things but I gotta start somewhere.

Chris

bailey1474 · #3 05-02-2006, 03:37 PM

My die is not a FL die though. It's just a neck die. I've got the body die for bumping the shoulder. If it was a FL I'd probably do just what you are doing.

Bart B · #4 05-02-2006, 06:25 PM

I'd size all of the neck and bump the shoulder back about .002-inch using a full-length sizing die. This is how the folks who've produced the smallest groups of 10 or more shots at long range size rimless cases. Sizing all of the neck usually results in the case neck being straighter and better aligned with the case body. And that means bullets seat straighter and have less runout.

uncleB · #5 05-02-2006, 10:52 PM

Bill,
start by backing off 1/4 turn so that the bushing is not on a bind then check runout on a concentricity guage if you have one. this should size about 3/4 of the neck ,that is just fine because with that die you cant size 100% of the neck. .0015 neck tension is good just make sure the neck wall thickness is the same on all your cases so the tension is consistant. and as always if you do exactly the opposite as BartB suggests your going in the right direction.
UB
p.s. have you got a straight 6-250 or is it an improved ??

Bart B · #6 05-03-2006, 02:43 AM

UncleB, you are a star. A distant star, but still a star.

jb1000br · #7 05-03-2006, 08:12 AM

Bart -- don't worry -- UB doesnt like me either [img]/ubbthreads/images/graemlins/smirk.gif[/img]

Bill -- here is what i do with redding's s-dies...use it or don't [img]/ubbthreads/images/graemlins/grin.gif[/img]

start with the bushing floating (stem backed off 1/4-1/2 turn)...run a case in the whole way and start to pull the ram back out...while keeping down pressure tighten the stem.

keeping down pressure on the ram while tightening the stem should center the bushing as it is tightened.

works for me...YMMV, and do confirm that is works with your conc. gage.

JB