Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Rifles, Reloading, Optics, Equipment > Rifles, Bullets, Barrels and Ballistics


Reply

new barrel break in

 
LinkBack Thread Tools Display Modes
  #29  
Old 12-29-2012, 09:12 PM
Platinum Member
 
Join Date: Jan 2005
Location: OK
Posts: 2,145
Re: new barrel break in

guys I wrote this a few years ago and stand buy it for the most part couple things I learned since then, read the follow up comments forum at the end of the article because the discussion is as informative as the article.

Custom Barrel Care At 17X

Bart, I don't know of a single person in the know, who claimed breaking in a barrel made them inherently more accurate, if you read my article I state reasons for brake in and non of them involve making the barrel "more" accurate. but I do believe brake in happens weather you do anything to that barrel or not.

I want my barrels to stabilize at a consistent velocity before I do a substantial load development, and this does require a certain number of rounds be fired down the bore. Gales article is got to be near 30 years old and he bases it on "break-in making a barrel more accurate" I'm not sure his excuses that this is all to sell more barrels has one ounce of validity. We have all had barrels that shot the first 5 bullets out of them into a 1/4" so a barrel does not need to be broke in to shoot well, BUT a Barrel will physically change enough in the first 100 rounds to; increase velocity, thus changing the "tune" of that load.

I cringe every time I see his article referenced as the end all be all in barrel conditioning.
Reply With Quote
  #30  
Old 12-29-2012, 10:07 PM
Platinum Member
 
Join Date: Dec 2008
Location: Great Falls, MT
Posts: 4,605
Re: new barrel break in

Deleted!
__________________

I voted for my "FREEDOM", "GUNS", and "MONEY" - keep the change - UNK.



"I am always proud of my country!"

"Leadership Rule #2: Don't be an @zzhole." - Maj Gen Burton Field.

Last edited by FEENIX; 12-29-2012 at 10:10 PM. Reason: DUPLICATE ENTRY
Reply With Quote
  #31  
Old 12-29-2012, 10:08 PM
Platinum Member
 
Join Date: Dec 2008
Location: Great Falls, MT
Posts: 4,605
Re: new barrel break in

Quote:
Originally Posted by Bart B View Post
To me, FEENIX asks:No, but every hand-held shoulder-fired arm gets its own shot dispersion added to by the dispersions of human physical behavior. To date, there's no tolerances set in the shooting sports as to what's the worst human dispersion that's allowed to test an arm for accuracy.
Duly noted ...



Quote:
Originally Posted by FEENIX View Post
As long as human factors are involved it will always complicate things.
Perhaps an opportunity for you to set the standards. Good luck!
__________________

I voted for my "FREEDOM", "GUNS", and "MONEY" - keep the change - UNK.



"I am always proud of my country!"

"Leadership Rule #2: Don't be an @zzhole." - Maj Gen Burton Field.
Reply With Quote
  #32  
Old 12-30-2012, 05:34 AM
Platinum Member
 
Join Date: Dec 2005
Posts: 2,114
Re: new barrel break in

Quote:
Originally Posted by Coyboy View Post
BUT a Barrel will physically change enough in the first 100 rounds to; increase velocity, thus changing the "tune" of that load.
What's the physics behind that velocity increase? If every bullet fired causes a microscopic amount of barrel wear, would not that cause less resistance to the bullet starting out and lower pressure therefore lower velocity?

And wouldn't a velocity increase only make a group print a bit higher than a velocity decreace? I don't understand how faster bullets would cluster tighter.

I've had 1000-yard groups where some bullets that left faster than slower ones print lower and slower ones print higher than the higher ones. Difference isn't much, only a couple inches.
Reply With Quote
  #33  
Old 12-30-2012, 09:51 AM
Platinum Member
 
Join Date: Jan 2005
Location: OK
Posts: 2,145
Re: new barrel break in

Quote:
Originally Posted by Bart B View Post
What's the physics behind that velocity increase?

I don't understand how faster bullets would cluster tighter.

I've had 1000-yard groups where some bullets that left faster than slower ones print lower and slower ones print higher than the higher ones. Difference isn't much, only a couple inches.
To answer your comments 1st one; I'm not an expert at internal ballistics, i'm reporting information I have gleaned and others in the industry have gleaned over years of work with thousands of custom barrels. I could give you my theory on this but likely it would just raise more illogical questions from you. You obviously didn't read the entirety of my article and the follow up discussion or you could have answered that from that info.


2nd. I never said faster bullets will cluster tighter, no one in the thread has stated that other than you. So what is your misconception about all this that you have these preconceived notions in your head which are so misleading?

3rd Your 1000 yard groups are affected by so many things that it is impossible to dictate what causes this or that. Your ability for one, condition changes as far as wind direction and velocity for 2, your ability to load ammo for 3 and I'm not just referring to speed of projectile but all the intricacies of brass prep and bullet run-out ect. Scope parallax, mirage, the list goes on.

So what is it that you concluded in your testing since you fail to account for anything other than the speed of the bullet?
Reply With Quote
  #34  
Old 12-30-2012, 10:21 AM
Platinum Member
 
Join Date: Dec 2008
Location: Great Falls, MT
Posts: 4,605
Re: new barrel break in

__________________

I voted for my "FREEDOM", "GUNS", and "MONEY" - keep the change - UNK.



"I am always proud of my country!"

"Leadership Rule #2: Don't be an @zzhole." - Maj Gen Burton Field.
Reply With Quote
  #35  
Old 12-30-2012, 10:23 AM
Platinum Member
 
Join Date: Dec 2005
Posts: 2,114
Re: new barrel break in

Jim See, I did read both pages in your article. You're making assumptions I didn't read it.

How does a barrel physically change enough in the first 100 rounds to; increase velocity, thus changing the "tune" of that load?

If that's too complex for you to answer or understand, so be it.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Current Poll
Do you archery hunt for elk?
YES - 32.68%
84 Votes
NO - 49.81%
128 Votes
Not yet, but I plan to. - 17.51%
45 Votes
Total Votes: 257
You may not vote on this poll.

All times are GMT -5. The time now is 08:02 PM.


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