Long Range Hunting Online Magazine


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

Reloading Techniques For Reloading


Reply

7mm Rem Mag Bushing Question

 
LinkBack Thread Tools Display Modes
  #1  
Old 10-06-2011, 08:25 PM
Bronze Member
 
Join Date: Oct 2011
Location: Raleigh N.C.
Posts: 70
7mm Rem Mag Bushing Question

I just spent several hours on the reloading bench and realized as I was about to seat my first bullet (175 SMK) that the neck was to large to put proper tension on the bullet. I'm using Redding Competition Dies and when I used the full length die it odviously expanded the neck. The Comp Dies did not come with any bushings, just said sold seperately. What size bushing do I need since I'm using a minimum spec 7mag chamber?
Reply With Quote
  #2  
Old 10-06-2011, 09:03 PM
Junior Member
 
Join Date: Feb 2011
Posts: 29
Re: 7mm Rem Mag Bushing Question

I shoot a 7mm also. As we know the 7mm is .284 caliber. Try going with a .282 bushing so your 2 thou smaller and see how the tension feels.
Reply With Quote
  #3  
Old 10-06-2011, 09:04 PM
Platinum Member
 
Join Date: Feb 2007
Location: Townsend, Montana.
Posts: 7,914
Re: 7mm Rem Mag Bushing Question

You need to measure the neck of a loaded round with the same brass mfg. that you will be reloading . Take that measurement and subtract .002" to .003" and get the size bushing.

Jeff
__________________
Reply With Quote
  #4  
Old 10-06-2011, 09:07 PM
Platinum Member
 
Join Date: Feb 2007
Location: Townsend, Montana.
Posts: 7,914
Re: 7mm Rem Mag Bushing Question

Quote:
Originally Posted by Darcey View Post
I shoot a 7mm also. As we know the 7mm is .284 caliber. Try going with a .282 bushing so your 2 thou smaller and see how the tension feels.

This is incorrect. You have to take in consideration the thickness of the brass also. The correct bushing will be .284 + (case neckness x 2) - .002"

Jeff
__________________
Reply With Quote
  #5  
Old 10-06-2011, 09:13 PM
Bronze Member
 
Join Date: Oct 2011
Location: Raleigh N.C.
Posts: 70
Re: 7mm Rem Mag Bushing Question

Broz,

I appreciate the input. The bushings range from .306-.314 and I have heard of this method from Reddings site, but with so many options I just wanted to know for sure before I order. Would it be better to subtract .002 or .003, I'm looking for best accuracy as this is a custom rifle that I will be shooting 1500 plus yards?
Reply With Quote
  #6  
Old 10-06-2011, 09:19 PM
Platinum Member
 
Join Date: Feb 2007
Location: Townsend, Montana.
Posts: 7,914
Re: 7mm Rem Mag Bushing Question

Quote:
Originally Posted by Special Delivery View Post
Broz,

I appreciate the input. The bushings range from .306-.314 and I have heard of this method from Reddings site, but with so many options I just wanted to know for sure before I order. Would it be better to subtract .002 or .003, I'm looking for best accuracy as this is a custom rifle that I will be shooting 1500 plus yards?
To be honest, if you only order 1 bushing I would order the -.003" Reason is sometimes when I order a -.002" and if the brass is not really consistant on thickness I get a few that feel looser. For a hunting load a bit more tension is good insurance. But if you want to do some testing order a few sizes and test a bit. Or get the -.003 and see what you end up with.

Jeff
__________________
Reply With Quote
  #7  
Old 10-06-2011, 09:28 PM
Junior Member
 
Join Date: Feb 2011
Posts: 29
Re: 7mm Rem Mag Bushing Question

Quote:
Originally Posted by Broz View Post
This is incorrect. You have to take in consideration the thickness of the brass also. The correct bushing will be .284 + (case neckness x 2) - .002"

Jeff
Thanx for correcting me. Totally had a brain fart. I know better. Don't want to steer anyone wrong.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: 7mm Rem Mag Bushing Question
Thread Thread Starter Forum Replies Last Post
Another bushing size question newmexkid Reloading 2 08-25-2011 11:30 AM
Another neck sizing /bushing die question BTnerd Reloading 7 10-19-2010 09:32 AM
Bushing die question Crane Reloading 2 11-03-2009 05:16 PM
Neck Bushing and Body Dies or FL Bushing Die??? MontanaRifleman Reloading 10 07-14-2009 07:29 AM
Which Bushing Neck Die 300 rum joel0407 Reloading 2 03-04-2009 08:51 AM


All times are GMT -5. The time now is 04:11 PM.


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