ASSRA Forum › General › Reloading the Single Shot Rifle › Trimming Brass
(Moderator Group: Moderator)
‹ Previous Topic | Next Topic ›
Page Index Toggle Pages: 1 Send TopicPrint
Normal Topic Trimming Brass (Read 2090 times)
RayH
Oldtimer
*****
Offline



Posts: 757
Location: Oldest City, FL
Joined: Jan 4th, 2012
Trimming Brass
Nov 13th, 2019 at 6:11pm
Print Post  
I am considering trimming brass cases to one uniform length. 
My inventory of cases vary in O.A.L. by as much as 0.03"  (1.280 - 1.250), following full length resizing.  New, unfired, unsized Starline cases average 1.283 +- .005. Chamber is .32-20CPA. I breech seat only.
Any comments would be appreciated. Thanks.
« Last Edit: Nov 14th, 2019 at 7:25am by RayH »  
In GOD We Trust
Back to top
 
IP Logged
 
40_Rod
Frequent Elocutionist
*****
Offline


Extremism in the persuit
of accuracy is not a
vice

Posts: 4285
Location: Knoxville, TN
Joined: Apr 20th, 2004
Re: Trimming Brass
Reply #1 - Nov 14th, 2019 at 10:05am
Print Post  
After fire forming i trim my short cases like the 32-20 CPA .005" short. my experience is that those cases grow a little especially if you anneal the brass.

40 Rod
  
Back to top
 
IP Logged
 
RayH
Oldtimer
*****
Offline



Posts: 757
Location: Oldest City, FL
Joined: Jan 4th, 2012
Re: Trimming Brass
Reply #2 - Nov 17th, 2019 at 7:57am
Print Post  
Will accuracy be affected by trimming to a length shorter than overall space allowed by a particular chamber? (again - breech seating)
As an example.........  I have 200 .25-20WCF cases. Most measure 1.315+- .002. The shortest 25 measure 1.295 +- .002.
Is there a positive or negative to trimming ALL my cases to the shorter O.A.L.?
  
In GOD We Trust
Back to top
 
IP Logged
 
40_Rod
Frequent Elocutionist
*****
Offline


Extremism in the persuit
of accuracy is not a
vice

Posts: 4285
Location: Knoxville, TN
Joined: Apr 20th, 2004
Re: Trimming Brass
Reply #3 - Nov 17th, 2019 at 10:00am
Print Post  
When Breech seating I don't believe that .005" has any real difference. You are dealing with two differend dimensions. The first the chamber and how the case fits the chamber. The second is the bullet placement in the throat. I think the more important of the two is the correct placement of the bullet in the throat.

40 Rod
  
Back to top
 
IP Logged
 
Page Index Toggle Pages: 1
Send TopicPrint
‹ Previous Topic | Next Topic ›
 
  « Board Index ‹ Board Top  

ASSRA Forum » Powered by YaBB 2.6.12!
YaBB Forum Software © 2000-2026. All Rights Reserved.

Valid RSS Valid XHTML Valid CSS Powered by Perl Source Forge

Page completed in 0.4928 seconds.