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bullet holes in target. (not perfectly round)

 
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  #8  
Old 11-12-2009, 08:08 PM
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Location: Blackfoot, Idaho
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Re: bullet holes in target. (not perfectly round)

My solution to your problem has been to switch to Nosler Solid Base bullets, either Ballistic Tips or Accubonds and the Hornady BTSP, the one with the lead tip and crimping ring.

All three have good terminal performance with the Hornady being a less explosive at ranges under 200 yds on deer size game.

If cleaning reveals an extraordinary amout of copper fouling I wouldn't hesitate to run at least a partial Tubbs Final Finish process. I've use the Tubbs FF once on a new factory barrel with out testing the necessity of it first. All I can say is that it sure didn't hurt anything.

Last edited by royinidaho; 11-12-2009 at 08:11 PM.
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  #9  
Old 11-12-2009, 08:21 PM
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Re: bullet holes in target. (not perfectly round)

+1 on the Tubbs FF
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  #10  
Old 11-14-2009, 01:36 AM
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Join Date: Aug 2009
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Re: bullet holes in target. (not perfectly round)

Thank you all for the input.

I think I know why I had that string of shots across the paper. For the 89 gr. load I never let the barrel cool between shots. I took 5 shots one right after the other. The barrel was hot enough where I couldn't hang on to it. I think this is an important factor in the stringy group and the yaw.

I've been shooting at the range every night this week and I decided to go against what a lot of you have told me to do. I decided to not clean the gun at all. Now don't get me wrong, I like everthing you guys suggested, but I think I might have been cleaning the gun too much to begin with. I've been using Bore Tec bore cleaner after every shooting session. So every new session I start I'm basically starting over with a new barrel that is ripping up the bullets as they travel down the barrel. It was mentioned earlier that my barrel may be hard on the bullets. So, I figured I should let the imperfections in the rifling fill in as to create a smoother surface. I think this will work to certain point.

Today after work I went to the range with a rifle that had 15 rounds through it uncleaned. I was able to achieve a .753 inch 3 shot group with this recipe.

175 gr sierra gameking
91 grains Retumbo
Remington brass
Federal 215 primer

The difference today was I let the barrel have ample cool time between shots, and I had a fowled (seasoned) barrel. I'd shoot one round at my target with the 7 RUM, then shoot my .22 pistol to pass the time for cooling. Thought it seemed like a logical think to do.

Now, what do you guys think about my theories here? Am I making sense, or am I just looney?
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  #11  
Old 11-14-2009, 01:39 AM
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Re: bullet holes in target. (not perfectly round)

The reason why I didn't switch powders and bullets yet is I have 100 sierra's and plenty of retumbo. Thought it would be worth spending the time with this combonation.
I will be buying some 160 gr accubonds on the future though.

Thank you
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  #12  
Old 11-14-2009, 08:54 AM
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Location: Blackfoot, Idaho
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Re: bullet holes in target. (not perfectly round)

After that experience T'were it I, I'd definitely give the Tubbs FF a go....

However, here is another fella's experience.

There was a fella acting really down in the mouth at the Los Alamos range this past summer. He had a 30-06 Rem 721 that was passed down from his grand father, father to him. As far as he could recall it had never been cleaned. It was a great shooter he said.

He got the idea that maybe he should clean it. He did and accuracy went wild, on the order of 3 MOA @ 100.

The only thing that had changed was the cleaning.

He came back the next week with 3 boxes of factory ammo. I think it was around 35 shots later that he had his accuracy back and resolved to never clean it again!

FWIW
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  #13  
Old 11-14-2009, 03:03 PM
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Location: Northern Id.
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Re: bullet holes in target. (not perfectly round)

I've had the same experience as Roy mentioned with a couple of old guns. Near tack driver with a dirty barrel to 2 moa with a clean one. I currently have a 6.5 Sherman with a Lilja barrel that I've learned not to clean down to bare steel as the groups go away and it takes quite a few shots to bring it back. This from a LAPPED barrel!.....Rich
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  #14  
Old 11-14-2009, 08:59 PM
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Re: bullet holes in target. (not perfectly round)

There are prefouling solutions.
I keep my guns cleaner than brand new. It's just something my father impressed in me. "Never put away a dirty gun"
What I've used for ~25yrs for prefouling is graphite, or lately(and better) WS2.
Just a dry burnishing after cleaning the barrel.

I've done this so that I can clean everytime, and protect the bore. The worst thing you can do to kill cold-bore accuracy, is leave oil in the bore. But you can't allow your bore to corrode either. The next worse thing for accuracy is generally the cold-clean-bore.
So I eliminate both with cleaning AND prefouling.
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