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Posted: 12/22/2011 7:02:08 PM EDT
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I have an 18'in WOA barrel chambered in 6.8. When i first got the barrel it shot great. Hand loaded 110gr. vmaxs were shooting right on top of each other. The barrel now has prob 200 rounds through it and the same exact load will not shoot as good. It will still shoot around an inch, but nowhere near how it did. Just kind of out of nowhere....
Scope and mount are tight and only thing I have changed recently is the stock. Once barrels "break-in" is it possibly they will shoot ammo differently? I dont know what to think. I have recently switched to a 90gr speer and they shoot around .5 moa. What happened with the V-maxs? |
| Are you shooting the same lot of V-max's? If you changed lots I would bet it is the lot. When you were getting .5 moa was the temp warmer or wind conditions different? And how many times could you shoot a 1/2 group how many shots for your group 3, 5 or 10. An extra cup of coffee can get my groups to open up. |
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Most likely copper fouling. Have you changed your loads, are these factory or home loads? From the original grouping rounds to now, is there a huge weather difference? Were the grouping shots fired from a cold barrel or warm barrel?
Start with a good thorough cleaning and go from there. Scrub the inside of the bore & chamber with a good solvent of your choice (I prefer Slip2000 725 Cleaner/Degreaser), and a good bore and chamber brush made of bronze/phosphorous. Once the chamber and bore are scrubbed well, push solvent soaked cotten patches through the bore on a jag to remove all the loosened fouling, keep pushing solvent soaked patches through until they come out clean. Remove the solvent by pushing patches through the barrel that are soaked in denatured alcohol. Now clean the inside of the barrel with a good copper solvent (my preference is Sweet's 7.62 Solvent). Push a copper solvent soaked patch through the barrel and let it sit in the barrel for a maximum of 10-minutes, then pushed a copper solvent soaked patch through the barrel (if it comes out blue/green, the blue/green is the liquified copper) and repeat with the copper solvent soaked patches until the come out clean. Then push a couple of patches of regular gun solvent through the barrel to remove the copper solvent, then remove the gun solvent with a couple of patches of denatured alcohol (failure to remove or leaving an ammonia based copper solvent in the barrel too long can result in it eating the barrel). CY6 Greg Sullivan "Sully" SLR15 Rifles TheDefensiveEdge.com (763) 712-0123 |
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