Long Range Hunting Online Magazine


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

Rifles, Bullets, Barrels & Ballistics Applied Ballistics


Reply

Cold bore shot vs dirty bore shot

 
LinkBack Thread Tools Display Modes
  #8  
Old 04-23-2012, 05:42 AM
Platinum Member
 
Join Date: Jan 2008
Location: Northeast
Posts: 2,423
Re: Cold bore shot vs dirty bore shot

While my primary LR rifle shows virtual no difference between clean, cold fouled , and hot fouled, I prefer to hunt with a fouled barrel. My other rifles need to be fouled. I only clean after 20-30 rounds or so, or if the rifle is subjected to high moisture conditions. Leaving nitro based fouling in the barrel for the duration of a hunt, or season will not cause barrel corrosion unless it gets damp/wet, and goes unfired for a extended period. I think you are ok with your fouled bore set up. I would also try a couple of multi shot groups without letting the barrel cool between shots. This could be a field condition should an accurate follow up shot be required. IMHO.
__________________

"Let us speak courteously, deal fairly, and keep ourselves armed and ready"-T. Roosevelt
Reply With Quote
  #9  
Old 04-23-2012, 06:37 AM
Platinum Member
 
Join Date: Aug 2003
Location: NC, oceanfront
Posts: 3,365
Re: Cold bore shot vs dirty bore shot

I've concluded based on my experience that barrel performance in this regard cannot be predicted or assumed. I've seen barrels(including best in aftermarket) throw cold-clean shots relatively far from fouled-warm shots to follow.
It's exactly why competitors get sighters.

It just needs to be verified and possibly adjusted for with your planned condition to shoot at game with. Your not gonna have sighters in the field to fresh foul and bring any barrel to stable temps. The best you can get is cold pre-fouled. Also don't forget to test off a bipod(in the dirt) if that's your field rest.
It can take a lot of discipline to validate this, and even more to adjust for it I know. But it's worth it when you can pull the gun from your safe, ground the bipod, and know your first shot will be as good as any.
Reply With Quote
  #10  
Old 04-23-2012, 07:29 AM
Platinum Member
 
Join Date: Dec 2005
Posts: 2,114
Re: Cold bore shot vs dirty bore shot

Quote:
Originally Posted by Mikecr View Post
I've seen barrels(including best in aftermarket) throw cold-clean shots relatively far from fouled-warm shots to follow. It's exactly why competitors get sighters.
All the better aftermarket centerfire barrels I've shot and seen used in competition since the 1960's shoot within 1/3 MOA for the first 5 shots through 600 yards, within 2/3 MOA up to 1000.

Competitors in high power competition have been getting sighters in some matches but not in others since the early 1900's because the wind cannot be controlled by the shooter. Sighters were never allowed based on equipment behavior because that can be compensated for by the shooter. Competant rifle shooters know how their first few bullets fly relative to the others fired later.
Reply With Quote
  #11  
Old 04-23-2012, 08:54 AM
Platinum Member
 
Join Date: Feb 2007
Location: Townsend, Montana.
Posts: 7,934
Re: Cold bore shot vs dirty bore shot

Keep in mind that cleaning practices will greatly effect your first round POI after cleaning. What you use for cleaning solution, and what you use in the bore is what I am talking about. If you aply oil to the bore how could it shoot the same as it does dry? This is why some shooters need to "foul" or I say "dry out" the barrel. I have worked with two of my long range rifles and they now shoot cold bore clean the same as they do after 20 shots through them cold bore. They will hold to within the 1/2 moa capabilities of the rifle, load and my skill level.


Jeff

Orange circle is 7"

__________________
Reply With Quote
  #12  
Old 04-23-2012, 04:39 PM
Platinum Member
 
Join Date: Aug 2003
Location: NC, oceanfront
Posts: 3,365
Re: Cold bore shot vs dirty bore shot

I can think of no sanctioned competition where sighters aren't built in.
And I doubt a competitor would include a cold shot with record shots.

But I'll look at the rules again & poll BRC to confirm.
Reply With Quote
  #13  
Old 04-23-2012, 06:10 PM
Platinum Member
 
Join Date: Dec 2005
Posts: 2,114
Re: Cold bore shot vs dirty bore shot

Quote:
Originally Posted by Mikecr View Post
I can think of no sanctioned competition where sighters aren't built in.
And I doubt a competitor would include a cold shot with record shots. But I'll look at the rules again & poll BRC to confirm.
Check out the NRA's high power rule books as well as the CMP ones for service rifle matches. Then get some match programs from match sponsors to see what matches sighters are allowed in and which ones they are not. You'll see that:

Service Rifle Excellence in Competition Matches (to get points towards earning the Distinguished Rifleman/Marksman gold badge) do not allow sighters; every round fired counts. Even those from a cold, clean barrel. These are fired at the Nationals, regionals and some state matches as well as matches within the Armed Services at their ranges.

At the CMP Nationals, the Presidents Hundred Match allows two sighters at 200 yards for the standing stage, but none for the 300 yard rapid fire nor 600 yard slow fire stages. No sighters either in the National Trophy Team Match nor the National Infantry Trophy Team Match.

In NRA local, state and regional and National matches as well as Military Local and Major Command Matches, sighters are typicaly not allowed in most team matches. Sighters are allowed in some, but not all, individual matches. When allowed, there's typically two at the start of each stage. Long range matches fired at ranges greater than 600 yards have either two or unlimited sighters depending on the specific match and program rules. And some long range team matches allow two sighters per shooter for each stage.

Now you can think of sanctioned competitions where sighters are not allowed.
Reply With Quote
  #14  
Old 04-23-2012, 10:49 PM
Platinum Member
 
Join Date: Aug 2003
Location: NC, oceanfront
Posts: 3,365
Re: Cold bore shot vs dirty bore shot

Thanks
And of IBS and NBRSA?
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: Cold bore shot vs dirty bore shot
Thread Thread Starter Forum Replies Last Post
Cold bore shot tnshooter111 Rifles, Bullets, Barrels & Ballistics 26 07-15-2010 02:01 PM
Cold bore shot group vs Warm bore shot group Alan Griffith Rifles, Bullets, Barrels & Ballistics 24 06-07-2010 11:58 AM
How is your cold bore shot different? teddy12b Long Range Hunting & Shooting 7 01-12-2009 09:59 PM
Cold bore shot moosehunter Rifles, Bullets, Barrels & Ballistics 2 09-16-2007 06:47 AM
Cold Bore Shot Earl Fouraker Long Range Hunting & Shooting 8 08-12-2007 08:31 PM


All times are GMT -5. The time now is 11:33 PM.


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