New Posts New Posts RSS Feed - barrel cooling question
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Check GunBroker.com for SWFA's No Reserve and No Minimum bid firearm auctions.

barrel cooling question

 Post Reply Post Reply   Topic Search Topic Search  Topic Options Topic Options
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/15/2009 at 15:01
nightranger View Drop Down
Optics Apprentice
Optics Apprentice
Avatar

Joined: September/02/2009
Location: California
Status: Offline
Points: 99
How long should I wait between shots when sighting in a 30-06 rifle?  Do I take 3 shots in succession or do I wait a certain amount of time between each shot to let the barrel cool down.  How long does it actually take for a barrel to cool down.  I know it was still pretty hot after waiting 10 minutes after a group of 3 shots at the range.  What is the maximum shots I can take in succession before letting the barrel cool.  
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/15/2009 at 15:47
jonoMT View Drop Down
Optics Master Extraordinaire
Optics Master Extraordinaire
Avatar

Joined: November/13/2008
Location: Montana
Status: Offline
Points: 4045
If your goal is to get a reliable zero for hunting, you should allow the barrel to fully cool between each shot. Ideally, you'll be out at the range when temperatures are fairly close to the average when you are hunting. If it's around 50-60F and I have the rifle in the shade, I find 5 minutes will easily do it. I've gone as long as 15 though. Also, keep your ammo at the same temperature - ideally in the shade.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/16/2009 at 03:37
8shots View Drop Down
Optics Jedi Knight
Optics Jedi Knight
Avatar
'lord of the flies'

Joined: March/14/2007
Location: South Africa
Status: Offline
Points: 5375
When I do 5 shot groupings I wait 1 min between each shot. This keeps the barrel cool.
 
I think the question remains why you want the barrel cool. It also depends on the ambient temp. On a really hot day the barrel can still be hot 1/2 hour later, whilst on a cold day 10 min is enough.
 
To avoid throat erosion and damage by overheating? Then I suggest no more then 5 shots in succesion and wait about 15-20 min before shooting again.
It must be said that I have shot my own rifles pretty hot (too hot to touch the barrel) and no immediate damage occurs. If one continually shoot a barrel to this point, then throat erosion will occur a lot quicker then if you kept the barrel cooler.
To achieve a good grouping and to avoid barrel "walk" ? Then 1 min between each shot, with a max of 5 shots.
To simulate hunting and the "cold barrel shot" then as jonoMT said above.


Edited by 8shots - September/16/2009 at 07:54
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/16/2009 at 08:48
Trays 7940 View Drop Down
Optics Master
Optics Master
Avatar

Joined: August/09/2009
Location: Texas
Status: Offline
Points: 1149
I let the barrel cool 1- 5 minutes then check the barrel with my fingers.  If its still warm I let it rest some more.  However, I have not had to wait to much longer than 5 minutes...  If you are using a heavy barrel it will not heat up as fast as lighter barrels.  Time and touch, too be sure....   Bandito
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/16/2009 at 10:51
Terry Lamb View Drop Down
Optics Apprentice
Optics Apprentice
Avatar

Joined: January/19/2009
Location: Sagle, Idaho
Status: Offline
Points: 148
Truth is rifles all have different personalities. But the cool barrel logic is unassailable. Your shot in the field will be from a cool barrel, so, ideally, your patterning at the range for hunting purposes should follow suit. On the other hand, my favorite hunting rifle does not begin to show stringing until after 5 or so pretty rapid shots, so patterns of three to five without cooling show excellent results, but after five they wander. Other rifles behave differently as a result of a wide array of variables, including barrel, bedding, etc. Nonetheless, to me, that first-shot-of-pattern is the most important for the hunter.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/16/2009 at 11:11
nightranger View Drop Down
Optics Apprentice
Optics Apprentice
Avatar

Joined: September/02/2009
Location: California
Status: Offline
Points: 99
Thanks everyone for your info.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: October/18/2009 at 00:37
robbie View Drop Down
Optics Apprentice
Optics Apprentice


Joined: November/13/2007
Location: United States
Status: Offline
Points: 132
When you talk about loosing pattern based on a hot barrel, how much creep are we talking?
 
In other words, if all shots cold produced a 1" pattern, what would one expect the pattern to be after 5 shots or whatever causes a hot barrel?
 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: October/18/2009 at 11:45
Terry Lamb View Drop Down
Optics Apprentice
Optics Apprentice
Avatar

Joined: January/19/2009
Location: Sagle, Idaho
Status: Offline
Points: 148
My primary rifle, an 03-A3 Springfield, begins to string vertically after 5 or 6 uninterrupted shots. The impacts, at 100 yards leave the normal sub-minute group and proceed northward as much as 2 additional inches as heating progresses. In this gun, a straight line would indicate a movement to the 1:00 position, not perfectly vertical.
 
I want to emphasize again, that virtually all rifles will behave differently, because there are so many variables. However, I believe the greatest variable is the action/barrel bedding. Even so, this rifle has a floated barrel, with stock contact only at the chamber end.
 
Some rifles may exhibit minimal change of pattern with heating, while mine exhibits pronounced behavior every time. Nontheless, mine is a hunter, and in the field should never be challenged by the hot barrel at game-shooting time. The long-range varmint shooter might have entirely different requirements.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: October/19/2009 at 08:48
338LAPUASLAP View Drop Down
Optics Master
Optics Master
Avatar

Joined: October/17/2009
Location: STATESIDE
Status: Offline
Points: 2166
WHAT TYPE OF AMMO???

New factory, New Reloads...

Old Junk Surplus???

Cleaning method??? 

Also a Cold Bore Zero is different than a Warm Bore Zero....

Zero has 27+- Variables...
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: October/20/2009 at 13:40
Terry Lamb View Drop Down
Optics Apprentice
Optics Apprentice
Avatar

Joined: January/19/2009
Location: Sagle, Idaho
Status: Offline
Points: 148
Originally posted by 338LAPUASLAP 338LAPUASLAP wrote:

WHAT TYPE OF AMMO???

New factory, New Reloads...

Old Junk Surplus???

Cleaning method??? 

Also a Cold Bore Zero is different than a Warm Bore Zero....

Zero has 27+- Variables...
Didn't know if you directed the question at me, but what the heck.
My 30-06 deer and elk loads are 51.0 grs 4895 under a Hornady 165 SST. The old rifle, however, begins to string hot regardless of the load.
Also, you did raise a good question about cleaning. I never hit the field with a freshly or thoroughly cleaned bore. My old rifle likes a "fouling" shot or two before it settles in to its excellent patterning. John Barsness has addressed this issue a few times. My theory is that oil/solvent residue and a lack of copper fouling in a bore cleaning down to original metal alter pressures enough to make a difference in these first few rounds' point of impact.
 Post Reply Post Reply
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Similar Threads: "barrel cooling question"
Subject Author Forum Replies Last Post
COOL under pressure? 300S&W General Hunting 12
Hard earned barrel lessons for cheap... 8shots Firearms 11
Cool 7mm08 ccoker Firearms 24
Why barrels will not last... 8shots Firearms 21
Shaw Barrels Turkey Agent Firearms 15
sig 1911 barrel for sale $85 JD548 Firearms For Sale 1
Bushnell 6500 -WOW COOL Urimaginaryfrnd Tactical Scopes 0
Cool Site That Monitors Firearms For Sale Chris Farris Firearms 1
16" Bull Barrel rifle mil169 Firearms For Sale 13
.30-06 M1 Garand barrel, misc parts/tools/ammo jonoMT Hunting and Shooting Gear For Sale 0


This page was generated in 0.109 seconds.