ASSRA Forum › General › General Discussion › Does it make a difference
(Moderator Group: Moderator)
‹ Previous Topic | Next Topic ›
Page Index Toggle Pages: 1 Send TopicPrint
Hot Topic (More than 10 Replies) Does it make a difference (Read 715 times)
Babydriver
Junior Member
**
Offline



Posts: 77
Joined: Mar 22nd, 2024
Does it make a difference
Mar 23rd, 2025 at 10:46am
Print Post  
Recently I went back to a rolling block in 40-50 SBN. Loaded the brass I had formed years ago. Noticed that when I loaded the cartridge powder, 45 grain of cartridge , there were two different levels of fill. Turned out some of the brass is UMC and the rest Starline. Would that make a difference in accuracy? 
  
Back to top
 
IP Logged
 
art_ruggiero
Frequent Elocutionist
*****
Offline



Posts: 1151
Location: CT
Joined: Dec 14th, 2008
Re: Does it make a difference
Reply #1 - Mar 23rd, 2025 at 12:33pm
Print Post  
yes
  
Back to top
 
IP Logged
 
Babydriver
Junior Member
**
Offline



Posts: 77
Joined: Mar 22nd, 2024
Re: Does it make a difference
Reply #2 - Mar 23rd, 2025 at 2:23pm
Print Post  
Can you elaborate?
Thanks
  
Back to top
 
IP Logged
 
rgchristensen
Frequent Elocutionist
*****
Offline



Posts: 1140
Joined: Jan 2nd, 2014
Re: Does it make a difference
Reply #3 - Mar 23rd, 2025 at 3:06pm
Print Post  
You can compensate (to a certain extent) by using a filler.  I like amaranth seeds (which can be found in health-food stores or on-line.).   They are hard, spherical seeds about 1 mm diameter, which dispense smoothly in powder measures.  Dump them on top of the charge and compare to your “standard” cases by chronographing.

I prefer Remington ctg cases, as they seem to be uniformly of a heavier construction than most others.

CHRIS
  
Back to top
 
IP Logged
 
bpjack
Frequent Elocutionist
*****
Offline



Posts: 3067
Location: East Olympia, WA
Joined: May 18th, 2008
Re: Does it make a difference
Reply #4 - Mar 23rd, 2025 at 3:25pm
Print Post  
Not on topic of case capacity, but I can corroborate Chris' observation on Remington brass. I was having issues with neck separation with Starline and Winchester 25-20 Win brass used for breech seating.  A case would rarely last 20 shots.  Jerry Hartwig recommended finding some (hard to get) Remington brass and the case issues have gone away.   

Jack
  
ASSRA # 11318
I haven’t lost all my marbles yet but there is definitely a hole in the bag somewhere.
Back to top
 
IP Logged
 
Babydriver
Junior Member
**
Offline



Posts: 77
Joined: Mar 22nd, 2024
Re: Does it make a difference
Reply #5 - Mar 23rd, 2025 at 3:29pm
Print Post  
Thanks for the suggestions. I think I’ll just make a few more out of Starline. Never have had a problem with them.
  
Back to top
 
IP Logged
 
nuclearcricket
Oldtimer
*****
Offline



Posts: 799
Joined: Oct 15th, 2008
Re: Does it make a difference
Reply #6 - Mar 23rd, 2025 at 4:01pm
Print Post  
different case volumes will give you slightly different velocitys and that will cause vertical stringing. Always  best to not mix brass if you can. Personaly I use Winchester for my 45-70, rem for my 40-65 and will use Starline for my 44-60. Am thinking of a 40-50 BN, Picked up a set of dies for it at a very good price. Now to pick an action for it. 
Sam
  
Back to top
 
IP Logged
 
oneatatime
Frequent Elocutionist
*****
Offline



Posts: 4004
Location: Rocky Mountains
Joined: Oct 30th, 2011
Re: Does it make a difference
Reply #7 - Mar 23rd, 2025 at 5:43pm
Print Post  
Another aspect is that different levels of powder compressed to the same level for loading can give different burning results again resulting in possible vertical stringing.
  
Back to top
 
IP Logged
 
jhm
Frequent Elocutionist
*****
Offline



Posts: 1678
Location: georgia
Joined: Sep 4th, 2011
Re: Does it make a difference
Reply #8 - Mar 24th, 2025 at 9:24am
Print Post  
I have built and shot three guns in that round. Latest one is on a Trapdoor. I shoot a 300 gr. RCBS bullet and some 4198 powder. Shoots good with not much recoil. My brass is Winchester. Have never shot black so have no experience there. It is a fun round but takes some work to make it shoot well.   



JMH
  
Back to top
 
IP Logged
 
marlinguy
Frequent Elocutionist
*****
Offline


Ballards may be weaker,
but they sure are neater!

Posts: 16732
Location: Oregon
Joined: Feb 2nd, 2009
Re: Does it make a difference
Reply #9 - Mar 24th, 2025 at 9:41am
Print Post  
Different case capacities with the same powder charge equal different chamber pressures, thus the different velocities.
Same thing happens with equal charge and case capacity, but different bullet weights. Changing bullet weights will increase or decrease velocity depending on how deep the bullet seats in the case.
  
(You need to Login or Register to view media files and links)
Back to top
 
IP Logged
 
Babydriver
Junior Member
**
Offline



Posts: 77
Joined: Mar 22nd, 2024
Re: Does it make a difference
Reply #10 - Mar 24th, 2025 at 10:39am
Print Post  
Thanks to everyone for the replies. I’ll stick with one case manufacturer.
  
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 © 2000-2025. All Rights Reserved.

Valid RSS Valid XHTML Valid CSS Powered by Perl Source Forge

Page completed in 0.5565 seconds.