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Rifles, Reloading, Optics, Equipment
Reloading
Help identifying 30-06 IMP rifle
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<blockquote data-quote="Timnterra" data-source="post: 2232877" data-attributes="member: 55944"><p>If I was you I would make a test case to see how loose the headspace is. To do this take a 30-06 case and expand the neck to something bigger like 338 or 35. Then unscrew your 30-06 die and back it out a turn or so. Run the case back into the 30-06 die leaving a very small false shoulder. Try it in the chamber. It probably will not close. Go back to the press and screw the die in about 1/16 of a rotation and try the case again. Rinse and repeat until it closes with resistance in the chamber. Then you can measure the distance from the false shoulder To the base and get your headspace measurement. It sounds like from the die mfg response that the chamber is oversized at the base which means it was probably not cut well by the gunsmith and needs to be rechambered. If that is the case there may only be two options. The first I'd explore is having the barrel set back one full revolution and rechambering with an actual standard 30-06 ai with 40 degree shoulder. Unfortunately this may not be possible if the base area of the chamber is too over sized. If that happens to be the case I would have it rechambered to 300 win mag and have the bolt face opened to magnum diameter. With the little amount of barrel shank you have It will not be possible to rechamber to 30-06 without replacing the barrel.</p></blockquote><p></p>
[QUOTE="Timnterra, post: 2232877, member: 55944"] If I was you I would make a test case to see how loose the headspace is. To do this take a 30-06 case and expand the neck to something bigger like 338 or 35. Then unscrew your 30-06 die and back it out a turn or so. Run the case back into the 30-06 die leaving a very small false shoulder. Try it in the chamber. It probably will not close. Go back to the press and screw the die in about 1/16 of a rotation and try the case again. Rinse and repeat until it closes with resistance in the chamber. Then you can measure the distance from the false shoulder To the base and get your headspace measurement. It sounds like from the die mfg response that the chamber is oversized at the base which means it was probably not cut well by the gunsmith and needs to be rechambered. If that is the case there may only be two options. The first I’d explore is having the barrel set back one full revolution and rechambering with an actual standard 30-06 ai with 40 degree shoulder. Unfortunately this may not be possible if the base area of the chamber is too over sized. If that happens to be the case I would have it rechambered to 300 win mag and have the bolt face opened to magnum diameter. With the little amount of barrel shank you have It will not be possible to rechamber to 30-06 without replacing the barrel. [/QUOTE]
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Help identifying 30-06 IMP rifle
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