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What is accurate?

 
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  #1  
Old 01-22-2006, 06:07 PM
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Join Date: Sep 2005
Posts: 7
What is accurate?

I had a very accurate factory rifle (rem. 700 LA) in .270win. After years of
shooting it had to be rebarrled. I decided to go the hole 9 yards and build a
precision rifle. Following is a list of components I used for a rebuild this
hunting rifle into a precision .308win rifle.

-Mike Rock 5R rifling double stress relieved stainless .30 barrel blank with a
11.2" twist.
-McMillan A5 stock
-H-S Precision mag kit
-Badger ordance recoil lug
-Badger ordance muzzle break
-Custom extended bolt handle

I then had the lugs laped, the trigger done and the hole thing put together by a
local guy. My problem is the rifle shoots no better than it did before, in fact it shoots worse! I feel lucky when I buy a factor rifle and it shoots 5/8" @ 100m, I feel taken when I get $3000 into a rifle that shoots 1-1 groups @ 100m. I have been handloading for years, Ammo is not the problem. My question is what groups can or should I expect form this rifle at 100-600m? I believe 1/4" 100m to 3 or 4" at 600m. My gunsmith says I am asking to much, what do you guys think?
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  #2  
Old 01-22-2006, 06:31 PM
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Join Date: Jun 2007
Location: Fredericksburg VA
Posts: 4,058
Re: What is accurate?

There is no doubt that gun with quality loads and MR 5R barrel should be under .5 quite easily IF it was put together right.

Think it is pretty safe to say something is wrong with the gun or the scope in all probability.

1. Change scopes with a quality scope that shoots good on another gun. Might be scope problem.

2. Check bases and rings to make sure that they are tight and screws are not coming through rcvr. many times a base was not tightened down or forgot to tighten the rings. Check action screws for correct tension.

3. Buy a box of Federal match or Black Hills reloads. Both will shoot under 1" normally, and use them for testing.

4. A gunsmith that puts together a custom rifle and then says that sub 1" is asking too much makes me suspicious of his workmanship.

5. Have someone else who you know can shoot .5 or better groups shoot it off a good rest or bags to confirm that it is not "headspacing" of the operator.

6. After all that take it to another known quality 1k, br or tactical smith that can go through it and find out what is wrong. chamber might be offcenter for example. Have seen them .020 out.

BH
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  #3  
Old 01-22-2006, 06:39 PM
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Join Date: Jan 2004
Location: Blackfoot, Idaho
Posts: 7,993
Re: What is accurate?

Hmmmmmm,

There seems to be some pieces of the puzzle missing.

Your expectations are well within reason.

I think the secret is in the proper mating of all of the components. I dink and fiddle with factory stuff and have quite good luck. But with the components you mention there would be less than a handful of smiths that I'd even let look at them let alone build the rifle.

I think you'll hear plenty about this.....
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  #4  
Old 01-22-2006, 06:49 PM
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Join Date: Nov 2005
Location: Riggins Idaho
Posts: 1,119
Re: What is accurate?

I'd flat be pissed. Sorry but a rifle that is built with those components should easily shoot under.5. If the gun smith says your asking for to much to have a rifle shoot under 1moa at 100yrds then you need to find a new gun smith.
Truly am sorry with how your rifle is shooting though after that much money. [img]/ubbthreads/images/graemlins/frown.gif[/img] [img]/ubbthreads/images/graemlins/frown.gif[/img] [img]/ubbthreads/images/graemlins/frown.gif[/img]
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Old 01-22-2006, 07:26 PM
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Join Date: Jan 2005
Location: OK
Posts: 2,145
Re: What is accurate?

Mickey, What was the accuracy of this custom gun before you talked about having the barrel taken off and recontoured? Did you have this done? Did your smith true the action before the build? How was the action bedded into the A-5?
What is the barrel countour now?

Sounds like your smith lacks some knowledge or experience in doing rifle builds if 1" is ok on a heavy barreled rifle. If that is what you have.

Load up some reduced loads and fire them for accuracy. If they group good with low pressure loads I would say something is amiss with the truing/squaring or lug contact.
Full pressure loads tend to magnify problems in this area.

Check out the bedding and screw tension.

Once in a great while you could get a bad barrel, this is unlikly though. If you talked to some one at Rock I'm sure they would volunter to scope the bore if you shipped it to them. They may find a problem with the chambering if thats where the problem lies.

Good luck,
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  #6  
Old 01-22-2006, 07:54 PM
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Join Date: Feb 2005
Posts: 564
Re: What is accurate?

"Load up some reduced loads and fire them for accuracy. If they group good with low pressure loads I would say something is amiss with the truing/squaring or lug contact.
Full pressure loads tend to magnify problems in this area."


Very good idea...

I would try 41.0 grains of IMR 4895 and a 168 grain bullet. If this shoots well, move up to the next accuracy node at 43.6 grains IMR 4895 with the 168 and try again.

Have you tried Federal Gold Medal Match in this rifle yet?

Dan
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  #7  
Old 01-22-2006, 08:05 PM
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Join Date: Dec 2004
Location: El Reno, OK
Posts: 1,930
Re: What is accurate?

Hate to hear this. I'm pissed if I can't get a factory rifle to shoot that well. I don't think I would be too nice about the situation either!!
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