Ive been noticing that I am getting far better accuracy with brand new brass or brass that has been once fired and FLS back to original than fired brass that has only been neck sized, is this a common thing, or is it just that my rifle prefers the FLS brass as opposed to the necked stuff, I would have thought that the fired brass should be superior, or could it be that my neck sizer is pulling the necks out of alignment?

In milsurp rifles which usually have generous chambers NS promotes better accuracy but there should be little or no difference in good commercial rifles.

I didn't notice that much of a difference in accuracy so, I started using a body die after Neck Sizing. I prefer the full sized loads while hunting anyway.


Good Luck!

Reloader

For years bench rest shooters have been neck sizing, only recently some of the guys have been full length sizing with at least as good accuracy. I still neck size myself, I guess the reason I havn't tried F.L. is that the only dies that I have I cut with the same reamer as I did the chamber with. That being a neck sizer, that is what I use and have found no reason not to do it this way. It is definatly easier on brass. Bob

Neck sizing seems working fine with customs rifle and standard rifles that have fine dimensions chambers(fine cut chamber).Out of standard dimensions(large,loose etc...chamber(body of the case not concentric) neck sizing doent seems working fine.I use PFLR(shoulder bump back.003",there is a gap between the die and the shell holder(1/12 turn or so).You needs a good seater,that align the bullet perfectly into the case.Some guys here tell,average standard rifles wont shoot.5MOA without modifications(trying 2 or 3 sets of dies,lots of combos bullet/powder,bedding etc..(not all of them).

I haven`t noticed much differance in FL vs NS ammo in my rifles. I think the differance shows more in very accurate BR / varmite type rifles and is a small gain in any case. The BR guys do it but they win matches with .001" smaller groups. How many have rifles or shooters can hold that well repetedly to see if they cut .10" off their groups?
I do neck size for some cartridges, but it`s more of a case life, easier clean up choice then because of any notible accuracy gain.

Hmmm very interesting replies, heres some pics of the groups so you can get an idea of what Im talking about, they are shot with a Sako 75 varmint barrel, laminated stock in .222 rem, no bedding or other customization has been done apart from a set trigger

http://img.photobucket.com/albums/v693/scaramanga69/NS.jpg[/IMG]]

http://img.photobucket.com/albums/v693/scaramanga69/FLS.jpg[/IMG]]

These were shot a 100 yrds I forgot to add

I have been considering an article wherein I compare results on the target after building the same loads using my Rockchucker press and RCBS dies as compared to the Redding Turret Press and Redding Type S dies and the Forster Co-Ax Press and their bench rest dies.

Has anybody tried this or a similar test, or do you know of such a test?

I started my research by emailing the support folks at Redding and Forster, also the Q&A people at loaddata.com.

Forster did not answer, Redding was non-committal and LD provided some information on preferences.

What do you folks think?

I expect to shoot a .308/.30-'06/.300 Mag class rifle in this test.

jim

quote:

Originally posted by scaramanga:
Ive been noticing that I am getting far better accuracy with brand new brass or brass that has been once fired and FLS back to original than fired brass that has only been neck sized, is this a common thing, or is it just that my rifle prefers the FLS brass as opposed to the necked stuff, I would have thought that the fired brass should be superior, or could it be that my neck sizer is pulling the necks out of alignment?

How consistent is this result? If possible, post a list of the group sizes for each.
Were all groups fired under controlled conditions?

The results are very consistent I have about 20 other targets which are pretty much the same, all shot with a 52 gr speer HPBT ,Lapua brass cci 400 primers ,21gr of N133, the only difference is the sizing of the brass, and the groups were all shot in a period of about 4 hrs in virtually zero wind ,letting the barrel cool right down between each shot.