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Long Range Hunting & Shooting
Any advise helpful!
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<blockquote data-quote="greenejc" data-source="post: 1501961" data-attributes="member: 60453"><p>This rifle can be made to shoot. The first thing you should do is stiffen the fore end. The Fore end may be flexing and touching the barrel, which will effect the barrel harmonics. You can use a fiberglass epoxy for that, making sure to just fill the pockets. Also, the stock may be designed to apply a slight upward pressure on the barrel and may be applying that pressure unevenly. Check to see if the barrel is free floated. Just run a dollar bill down the bottom of the barrel from the front of the stock back to the action. If its free floated, check the torque on the mounting bolts for the action. Also, experiment with some of the heavier bullets, such as the Sierra 180 grain bullets. The object is to find a load that exits the barrel at the top of its arc. My Ruger M77 MKII shoots most accurately with either Sierra 180 grain Gamekings, Sierra Pro Hunters, or Speer 180 grain boattail bullets over 55 to 55.5 grains of IMR 4350 using Remington or Winchester brass and Remington 9 1/2 primers. Also, are you shooting on a still day? What groups are you posting at 200 and 300 yards, and remember, ballistic tables are a guideline. Your rifle may have a 'fast' barrel, and be posting a higher muzzle velocity than that listed for your load, which would account for the higher impact at distance. And don't dial if you already have aimpoints inside your scope. Use the aimpoints in the reticle. A check for stock stiffness is to shoot from sandbags and sandbag the stock near the action, then shoot a group, and then sandbag the fore end under the sling attachment and shoot a group. If the two groups impact within 1/2 inch of each other, the stock fore end isn't the problem.</p></blockquote><p></p>
[QUOTE="greenejc, post: 1501961, member: 60453"] This rifle can be made to shoot. The first thing you should do is stiffen the fore end. The Fore end may be flexing and touching the barrel, which will effect the barrel harmonics. You can use a fiberglass epoxy for that, making sure to just fill the pockets. Also, the stock may be designed to apply a slight upward pressure on the barrel and may be applying that pressure unevenly. Check to see if the barrel is free floated. Just run a dollar bill down the bottom of the barrel from the front of the stock back to the action. If its free floated, check the torque on the mounting bolts for the action. Also, experiment with some of the heavier bullets, such as the Sierra 180 grain bullets. The object is to find a load that exits the barrel at the top of its arc. My Ruger M77 MKII shoots most accurately with either Sierra 180 grain Gamekings, Sierra Pro Hunters, or Speer 180 grain boattail bullets over 55 to 55.5 grains of IMR 4350 using Remington or Winchester brass and Remington 9 1/2 primers. Also, are you shooting on a still day? What groups are you posting at 200 and 300 yards, and remember, ballistic tables are a guideline. Your rifle may have a 'fast' barrel, and be posting a higher muzzle velocity than that listed for your load, which would account for the higher impact at distance. And don't dial if you already have aimpoints inside your scope. Use the aimpoints in the reticle. A check for stock stiffness is to shoot from sandbags and sandbag the stock near the action, then shoot a group, and then sandbag the fore end under the sling attachment and shoot a group. If the two groups impact within 1/2 inch of each other, the stock fore end isn't the problem. [/QUOTE]
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