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Extreme Long Range Hunting & Shooting (ELR) Over 1,000 Yds.


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1000 yard problems.

 
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  #1  
Old 05-05-2012, 02:16 PM
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Join Date: May 2012
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1000 yard problems.

Hey guys I am having some issues with my rifle when I am shooting 1000 yards. The first 2 are right on, then by about the 10th shell I am probably 4' low. Anybody tell me why this is happening??
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  #2  
Old 05-05-2012, 02:35 PM
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Re: 1000 yard problems.

Tell us more about your rifle, caliber, ammo and bullet used and maye we can help.

From the little info you posted my only guess is heat and a stressing barrel or touching stock.

Jeff
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  #3  
Old 05-05-2012, 03:16 PM
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Re: 1000 yard problems.

How long did it take to shoot your string? I'm with Broz, sounds like a heat issue, but If there was ample time for cooling, it could be a slight fouling issue. But after only 10 rounds its not that likely. Repeatable vertical string like this, is usually heat, or stress related. It can also indicate inconsistent charge weights, but in that case it would be more erotic grouping in a vertical string, not constantly working in one direction.
Need more info for a better diagnosis.
Aside from what info Broz mentioned, try to include things like:
How repeatable is it?
-does the group always walk its way downhill?
-does it only show up at real long range, or is it slightly noticeable at other ranges as well?
Etc.
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  #4  
Old 05-05-2012, 06:56 PM
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Join Date: May 2012
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Re: 1000 yard problems.

hey guys, thanks for trying to help me out. i have floated the barrel, i have shot 1000 yards 2 times, and it has done it both times. the group consistantly walks downhill. i have really knoticed it at long range, but i have not tried shooting it at maybe 100 yards to see if it does it there.

my set up is: *winchester model 70, 270wsm
*Vortex crossfire 6-24x50 mil-dot/w turret system
*Nosler 140g Hunting Ballistic tip hand loads, 3067 fps

the heat is sounding resonable, because as your barrel expands from the heat you get less pressure, and that means less velocity, which would cause it to consistantly start dropping low.

my shots are placed about 1-2 minutes apart.
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  #5  
Old 05-11-2012, 02:05 PM
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Re: 1000 yard problems.

how heavy is the barrel??? that many shots with a WSM with only 1-2 minutes in between unless your barrel is something over .750 I would say it's getting too hot. I had a 300wby that if you put 3 shots through it an didn't space them out at least 4-5 minutes apart the heat on the barrel could burn your skin. it was a SUPER skinny barrel. I only shoot heavy barrels now cuz of that exact reason.
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  #6  
Old 05-12-2012, 02:04 PM
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Posts: 16
Re: 1000 yard problems.

It is a standard factory barrel. Sounds like heat is my issue
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  #7  
Old 05-12-2012, 11:08 PM
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Location: Las Vegas, NV
Posts: 541
Re: 1000 yard problems.

Agreed its likely a heat issue.

I shoot a true 7 WSM for ELR (out to 1,850 yards so far) and for 1,000 yard F-Class. The F-class is roughly 24 shots in less than 18 minutes - at least the way I tend to run my relays.

My rig has a large contour barrel and shoots with tight elevation from the load over the course of the 24-25 shots. I will say that it does take 3-4 shots before the elevation completely settles in at that rate of fire. Even so, I am not shifting more than 1/2 to 3/4 minute at 1,000 yards as it heats in.

Jeffvn
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