Page Index Toggle Pages: 1 Send TopicPrint
Normal Topic Accuracy difference between breech seated & fixed (Read 1168 times)
Bulseyetom
Oldtimer
*****
Offline



Posts: 550
Location: Santa Maria, Ca
Joined: Oct 31st, 2010
Accuracy difference between breech seated & fixed
Apr 24th, 2019 at 1:51pm
Print Post  
I am quite impressed with the groups pictured here of breech seated bullets shot off of a bench.  It appears that breech seating when everything is worked out is definitely more accurate than fixed ammo, but in the real world how much does a group increase when with the same rifle a well tuned fixed load is fired?  I relize in competition every edge is required but was curious as to how much is lost by fixed ammo.  Tom
  
Back to top
Twitter  
IP Logged
 
calledflyer
Frequent Elocutionist
*****
Offline



Posts: 2786
Joined: Mar 9th, 2015
Re: Accuracy difference between breech seated & fixed
Reply #1 - Apr 24th, 2019 at 2:06pm
Print Post  
In a good rifle, with it's best fixed load compared to a breech seated round, very little is lost. That said, the b.s. is the better way to go in competition, where it can be done.
If you were hunting, it'd be silly to b.s. And, for serious, but non-match shooting choose what you like.
  

happily ignored by J. "Sonny" Louis
Back to top
 
IP Logged
 
Bulseyetom
Oldtimer
*****
Offline



Posts: 550
Location: Santa Maria, Ca
Joined: Oct 31st, 2010
Re: Accuracy difference between breech seated & fixed
Reply #2 - Apr 24th, 2019 at 3:37pm
Print Post  
Having shot short range benchrest at 100 yards with a 22ppc and 6ppc for several years I know the work that goes into shooting 100 yard groups in the 3's like those shown!  All I can say is Wow!  Cheesy  Tom
  
Back to top
Twitter  
IP Logged
 
Bulseyetom
Oldtimer
*****
Offline



Posts: 550
Location: Santa Maria, Ca
Joined: Oct 31st, 2010
Re: Accuracy difference between breech seated & fixed
Reply #3 - Apr 24th, 2019 at 3:41pm
Print Post  
Dave, how often do you clean the barrel in a match?  Do you have a separate target for sighters?  Tom
  
Back to top
Twitter  
IP Logged
 
40_Rod
ASSRA Journal Editor
*****
Offline


Extremism in the persuit
of accuracy is not a
vice

Posts: 4022
Location: Knoxville, TN
Joined: Apr 20th, 2004
Re: Accuracy difference between breech seated & fixed
Reply #4 - Apr 28th, 2019 at 10:02am
Print Post  
The last guy who I remember doing really accurate gun smithing for fixed ammunition was Egan. He chambered rifles for his molds and some of those rifles were very accurate.

40 Rod
  
Back to top
 
IP Logged
 
JS47
Frequent Elocutionist
*****
Offline


Member # 10889

Posts: 1155
Location: Alaska
Joined: Oct 12th, 2012
Re: Accuracy difference between breech seated & fixed
Reply #5 - Apr 28th, 2019 at 11:07pm
Print Post  
What breech seating does is insure that the bullet is started straight into the rifling by eliminating any variations in the cases. With a minimum dimension bench rest chamber and cases that have been turned to fit that chamber you can shoot fixed ammunition as well as Tony Boyer if you can shoot to the conditions. Breech seating is just a whole lot easier if you're not up against a short time constraint.

JS
  

"I'll be happy to contribute to the wolf recovery program, 180 grains at a time"  Unknown western rancher
Back to top
 
IP Logged
 
gunlaker
Frequent Elocutionist
*****
Offline



Posts: 1757
Location: lower mainland, B.C.
Joined: Dec 13th, 2010
Re: Accuracy difference between breech seated & fixed
Reply #6 - Apr 29th, 2019 at 12:43pm
Print Post  
I suspect that if you have a chamber with the right dimensions and a bullet that works perfectly with it, then there might not be much difference, but in all of my .32-40 & .38-55 rifles it was pretty easy to get them shooting really well with breech seated bullets. 

The bullet still has to fit well, but I think breech seating is the easiest way to extract the most accuracy.

Chris.
  
Back to top
 
IP Logged
 
Page Index Toggle Pages: 1
Send TopicPrint