THE ACCURATERELOADING.COM FORUMS


Moderators: Mark
Go
New
Find
Notify
Tools
Reply
  
.307 - .308 advice
 Login/Join
 
one of us
posted
I've been reloading both these calibers for quite sometime, and today I found quite to my amazement that my win 94 .307 perfectly cycles .308 brass. Knowing that the dimensions of these two cartridges are identical - except for the rim, and that they are both loaded to the same 52,000 cup pressure limits, why not use .308 brass with flat nose bullets? Any thoughts?
 
Posts: 151 | Registered: 31 December 2002Reply With Quote
one of us
posted Hide Post
Never fired or had a .307, but doesn't it
headspace on the rim? (isn't that why it's
there???) If it headspaces on the shoulder,
like the .308. I don't see any big problem
with it. But again, I don't really know, so
don't take my word for it...

reloader-1
 
Posts: 270 | Location: Central Pa | Registered: 03 December 2002Reply With Quote
one of us
posted Hide Post
Reloader-1, your right, the .307 does headspace on the rim, but since the dimensions are exactly the same as the .308, why can't it headspace on the shoulder? People have been doing this with magnum cartridges for years - sizing so that it headspaces not on the belt, but on the shoulder.
 
Posts: 151 | Registered: 31 December 2002Reply With Quote
one of us
Picture of John Y Cannuck
posted Hide Post
I agree, it should work, but, you don't likely have the same grip on the case for extraction, so you may get into trouble there. Also, the case will not be suported as well in the head area, there will be a big gap where the rimmed case used to go, I suggest starting well below max. Maybe well below starting loads might be better!

[ 01-09-2003, 16:41: Message edited by: John Y Cannuck ]
 
Posts: 872 | Location: Lindsay Ontario Canada | Registered: 14 April 2001Reply With Quote
one of us
posted Hide Post
I don't have the SAAMI specs in front of me, but as I recall, the .307 is limited to lower pressures than the .308. The action of the gun for which it is chambered is certainly not as strong as actions for .308's.

Otherwise, yes, a .308 may be fired in a .307 chamber (provided it is loaded within pressure limits permissable in the particular gun). It will simply headspace on the shoulder. Be cautious, however, since the .307 chamber was cut with the idea that it would headspace on the rim, you may find the base-to-shoulder dimension of your .307 chamber on the long side.

The problem is that you will have to extract the fired case with a cleaning rod. Why are we having this discussion, anyway?
 
Posts: 13263 | Location: Henly, TX, USA | Registered: 04 April 2001Reply With Quote
one of us
posted Hide Post
quote:
Originally posted by Stonecreek:
Why are we having this discussion, anyway?

[Wink] My sentiments also!

Call up Winchester and ask them if you can do this?
 
Posts: 5543 | Registered: 09 December 2002Reply With Quote
  Powered by Social Strata  
 


Copyright December 1997-2023 Accuratereloading.com


Visit our on-line store for AR Memorabilia