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Rifles, Reloading, Optics, Equipment
Gunsmithing
Need Advice Glass Bedding a Winchester M70
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<blockquote data-quote="65WSM" data-source="post: 879187" data-attributes="member: 9551"><p>Aluminum is for people who do not hunt. Aluminum will expand and contract with the outside temperature at a rate greater than steel or epoxy. Look up the coefficient of expansion in your Handbook of Physics if you don't believe me. Aluminum also has a "modulus" of stiffness very close to your laminated wood. No gain there. You will be best served by epoxy bedding up to the sight lug. For wiggles and grins I put some graphite fibers from TAP Plastics into the sides and bottom of the bedding. </p><p> </p><p>Remember to put tape and then wax it with shoe polish Neutral, on the muzzle side of the recoil lug and the bottom of the recoil lug. The Model 70 recoil lug and flat bottom will make it very accurate if they do not bottom out when you tighten the guard screws. Leave a hundredth to a fiftieth forward and below the lug. </p><p></p><p>My experience with 4 Pre-64 barrels is they are 1.5 inch to 2.5 inch groupers. Barrel quality and chamber dimensions have improved but then I was not using Wilson dies either.</p></blockquote><p></p>
[QUOTE="65WSM, post: 879187, member: 9551"] Aluminum is for people who do not hunt. Aluminum will expand and contract with the outside temperature at a rate greater than steel or epoxy. Look up the coefficient of expansion in your Handbook of Physics if you don't believe me. Aluminum also has a "modulus" of stiffness very close to your laminated wood. No gain there. You will be best served by epoxy bedding up to the sight lug. For wiggles and grins I put some graphite fibers from TAP Plastics into the sides and bottom of the bedding. Remember to put tape and then wax it with shoe polish Neutral, on the muzzle side of the recoil lug and the bottom of the recoil lug. The Model 70 recoil lug and flat bottom will make it very accurate if they do not bottom out when you tighten the guard screws. Leave a hundredth to a fiftieth forward and below the lug. My experience with 4 Pre-64 barrels is they are 1.5 inch to 2.5 inch groupers. Barrel quality and chamber dimensions have improved but then I was not using Wilson dies either. [/QUOTE]
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Need Advice Glass Bedding a Winchester M70
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