Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Rifles, Reloading, Optics, Equipment > Reloading

Reloading Techniques For Reloading


Reply

Which Neck Sizer to use

 
LinkBack Thread Tools Display Modes
  #1  
Old 12-06-2011, 05:30 PM
Platinum Member
 
Join Date: Dec 2008
Location: Northern Id.
Posts: 3,314
Which Neck Sizer to use

Which neck sizer would you guys use to size a 375 Ruger down to .338? The purpose would be to step the 375 case down to .338 on my way to a 30/375....rich
Reply With Quote
  #2  
Old 12-06-2011, 06:47 PM
Silver Member
 
Join Date: Aug 2011
Location: martinsdale,montana
Posts: 143
Re: Which Neck Sizer to use

i use the 338 rcm and 300rcm to step down to 7mm 375 the other option might be the 7lrm brass from gunwerks you would just need to step up to 30cal. hornady may also have brass too. we had a guy come hunt this year that has a 30 375 he got though there 1000 brench rest program sorry cant remembered what he called it and his brass was head stamped for the caliber.
Reply With Quote
  #3  
Old 12-06-2011, 07:06 PM
Platinum Member
 
Join Date: Dec 2008
Location: Northern Id.
Posts: 3,314
Re: Which Neck Sizer to use

Quote:
Originally Posted by elktaxi1 View Post
i use the 338 rcm and 300rcm to step down to 7mm 375 the other option might be the 7lrm brass from gunwerks you would just need to step up to 30cal. hornady may also have brass too. we had a guy come hunt this year that has a 30 375 he got though there 1000 brench rest program sorry cant remembered what he called it and his brass was head stamped for the caliber.
The problem I have is I am pushing the shoulder back approx. .080" so I am first using a 375 full length to get the shoulder where it needs to be. The RCM might be ok after that (what is the shoulder diameter of the RCM?) If it is wide enough, it should work. I was thinking of a RUM, Lapua, etc., to be sure of the width?
LRM brass is out as they won't sell it unless you buy a rifle from them! I have talked to Hornady about brass but have had no luck there.
I think if I just use the 375 full length, and then the right 338 neck sizer, I can get really close and then fire form the rest to get my 40 degree shoulder. (or maybe even push it back the rest of the way with my 40 degree die when I get it)......Rich
Reply With Quote
  #4  
Old 12-06-2011, 10:42 PM
Gold Member
 
Join Date: Jun 2006
Location: Shangri-La
Posts: 923
Re: Which Neck Sizer to use

Hey elkaholic

I was told by Hornady that a neck sizer for taking down the 375 neck down to 338 would not work, you have to use a FULL LENGTH 338 die. The reason was because the neck sizer would catch the case mouth and crush the case while the full length die had a more gradual forcing cone and would work.

I can speak from experience that the 338RCM Full Length die will take the neck down without crushing the case and then the 300RCM Neck sizer will take it down to 30 caliber.

But you might get a 338 neck sizer to work, I followed their advice and got the dies mentioned above
__________________
If you can read this, thank a teacher.......if you are reading this in English, thank a soldier.
Reply With Quote
  #5  
Old 12-10-2011, 12:44 PM
Platinum Member
 
Join Date: Jun 2010
Location: greenwood, IN
Posts: 3,546
Re: Which Neck Sizer to use

Quote:
Originally Posted by elkaholic View Post
Which neck sizer would you guys use to size a 375 Ruger down to .338? The purpose would be to step the 375 case down to .338 on my way to a 30/375....rich
if you have access to a few machines, I simply build my own die to rough in the case to size. I would make a series of bushings that had the shoulder angle machined on ne end, and the bore would be whatever I was after minus .003" for spring back. I'd probably take the neck down in three or four steps, and then finish it with a regular die. (should size the necks down .003 to .005"). You can buy hard steel bushings from a bearing reseller that will be about .100" wall thickness, and as hard as your ex wife's lawyer in court. They cut pretty easy with a ceramic insert. Of course you could also use drill bushings, but think they'll be too big in diameter. Or you could simply turn them out of A2 and have them hardened (A2 will not change during heat treat so machine to size). You can but the inner races in .312", 9mm, and .375" in various lengths. For the die body, I'd use 4150 pretreat steel, and run the chamber reamer thru it. Then cut the other end fr the bushings with a cap of some sort to hold them in place. Then after all this is done simply have it nitrided for a .025" case. (you might even be able to get by without nitride hardening being as all your doing is a neck and shoulder rework). I don't think I'd do this with a regular bushing die as I don't the the bushing retaining cap will be strong enough. You'll need something much heavier in construction. I kniow a guy that uses a similar setup to form 30 Meyer cases, and they are a bitch to form. He has to take .284 brass out to 35 caliber and then shrink the necks and push the shoulder back quite a bit. He does it in an arbor press.
gary
Reply With Quote
  #6  
Old 12-10-2011, 12:49 PM
Platinum Member
 
Join Date: Jun 2010
Location: greenwood, IN
Posts: 3,546
Re: Which Neck Sizer to use

Quote:
Originally Posted by woods View Post
Hey elkaholic

I was told by Hornady that a neck sizer for taking down the 375 neck down to 338 would not work, you have to use a FULL LENGTH 338 die. The reason was because the neck sizer would catch the case mouth and crush the case while the full length die had a more gradual forcing cone and would work.

I can speak from experience that the 338RCM Full Length die will take the neck down without crushing the case and then the 300RCM Neck sizer will take it down to 30 caliber.

But you might get a 338 neck sizer to work, I followed their advice and got the dies mentioned above
that's correct. You should only size the necks down about .025" at a time. Pushing a shoulder back .08" is not gonna be even slightly fun, and is normally done is a series of steps. You should also anneal the case way beyond what you would shoot at. They'll work harden pretty good along the way.
gary
Reply With Quote
  #7  
Old 12-10-2011, 01:21 PM
Platinum Member
 
Join Date: Feb 2007
Location: Townsend, Montana.
Posts: 7,739
Re: Which Neck Sizer to use

Why not buy one Redding neck bushing die and 3 bushings to do it in steps? This is how I do the 7mm - 300 win and it works golden with little runout induced.

Jeff
__________________
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: Which Neck Sizer to use
Thread Thread Starter Forum Replies Last Post
WTB .308 neck sizer die. leeks Reloading Equipment and Components 0 05-20-2011 07:09 PM
300 WM neck sizer die used for 300 RUM CASE ??? bigbuck Reloading 0 06-17-2010 09:05 AM
neck sizer dave1 Reloading 4 10-15-2009 07:29 PM
Lee collet neck sizer jmason Reloading 3 11-10-2008 12:34 PM
300 WinMag Neck Sizer for 30-338 Utah Shotgunner Reloading 5 01-18-2007 10:22 PM

Current Poll
In the last 12 months, what was your longest rifle kill on big game?
0 to 200 yards - 25.93%
1,531 Vote
201 to 400 yards - 32.13%
1,897 Vote
401 to 600 yards - 23.10%
1,364 Vote
601 to 800 yards - 10.01%
591 Votes
801 to 1,000 yards - 3.91%
231 Votes
Over 1,000 yards - 4.91%
290 Votes
Total Votes: 5,904
You may not vote on this poll.

All times are GMT -5. The time now is 08:42 PM.


Powered by vBulletin ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Management Powered by vBadvanced CMPS
All content ©2010-2014 Long Range Hunting, LLC