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07-04-2011, 11:51 AM
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model 559 inconsistent accuracy
I have a 559 that after bore sighting will accurately shoot a couple of rounds and then scatter a few more. We are shooting commercial reloads. I'm concerned the barrel lugs are not locking solidly to the slide. Any suggestions on how remedy this problem?
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07-04-2011, 12:43 PM
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Welcome to the Forum.
The first thing to try is different ammunition.
The second thing to try is a different shooter.
If the firearm exhibits the same trend of a few tight shots and a few wild shots with several brands of factory ammunition (no reloads) and does this with every shooter that tries the firearm, then I would replace the barrel.
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07-04-2011, 03:01 PM
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Thanks-this occurred with 2 different shooters, so I also suspect the ammo. We'll try some high quality ammo and see how it goes.
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07-04-2011, 03:33 PM
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Quote:
Originally Posted by alfasean
Thanks-this occurred with 2 different shooters, so I also suspect the ammo. We'll try some high quality ammo and see how it goes.
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I would look at the condition of the bore. Is it leaded? Is the rifling sharp? Either could cause this problem.
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07-04-2011, 04:14 PM
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Stocks.
I love the metal framed 9's. Everything from the 39-2 to the 908s. Being a collector as much as a shooter, I always kept them box stock. But the frustrating thing for me was that I couldn't shoot the damn things.
I'd usually hit with the first round or maybe two then I'd shoot low thereafter. It was so bad that I gave up on them. Then one day about three years ago a pal of mine let me shoot a Pachmeyer stocked 39-2. The difference was night and day and actually started me.
Yes it helps to have a really good trigger, but for me, rubber stocks make all the difference is grip consistancy. Even more so for the blocky double stack guns.
Today, my EDC gun is a 908S frame matched to a 910s slide for a really nice CCW gun and I can hit with it every round.
Drew
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07-04-2011, 08:00 PM
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I had a similar problem with a Model 639, a cousin of your model. A forum member advised me to check end-shake. Do this by trying to move the barrel fore and aft when the weapon is in battery. In my case, the barrel would move .025". A new barrel fixed the problem and it has grouped well since. Another item (easier) to check is that the muzzle is properly crowned without rough spots.
After:
__________________
-jwk-
US Army '72-'95
Last edited by TAROMAN; 07-04-2011 at 08:03 PM.
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