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Rifles, Reloading, Optics, Equipment
Gunsmithing
Excess headspace - Win M70 30-06 pre-64
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<blockquote data-quote="Stammster" data-source="post: 1942714" data-attributes="member: 114381"><p>The condition of the gun suggests little use, so I don't think the excess head space is due to a sloppy shot out barrel.</p><p></p><p>My understanding is the late year pre-64 Winchester's suffered from some financial struggles, and rather than control the tolerances of the barrels and bolts, they relied on setting the correct headspace with a variance - in both - by matching things up before they left the factory. This doesn't change the fact the headspace is clearly out of SAAMI spec by my measurements.</p><p></p><p>However, if I properly fire form "new brass" to correct the excess headspace issue, I don't see the concern. It's just not a standard 30-06 at that point. Please explain to me how this is any different than if the chamber was modified in both angle and increased length like what happens when you bore out longer (I.e. Gibbs). Of course in this case the barrel stamping is incorrect, but as the sole owner/operator - I can live with that.</p><p></p><p>Plus, after shooting 10 different brands of factory ammo, to didn't "blow my face off".</p><p></p><p>Any other suggestions other than a $400 gunsmith rework on a $750 gun?</p></blockquote><p></p>
[QUOTE="Stammster, post: 1942714, member: 114381"] The condition of the gun suggests little use, so I don’t think the excess head space is due to a sloppy shot out barrel. My understanding is the late year pre-64 Winchester’s suffered from some financial struggles, and rather than control the tolerances of the barrels and bolts, they relied on setting the correct headspace with a variance - in both - by matching things up before they left the factory. This doesn’t change the fact the headspace is clearly out of SAAMI spec by my measurements. However, if I properly fire form “new brass” to correct the excess headspace issue, I don’t see the concern. It’s just not a standard 30-06 at that point. Please explain to me how this is any different than if the chamber was modified in both angle and increased length like what happens when you bore out longer (I.e. Gibbs). Of course in this case the barrel stamping is incorrect, but as the sole owner/operator - I can live with that. Plus, after shooting 10 different brands of factory ammo, to didn’t “blow my face off”. Any other suggestions other than a $400 gunsmith rework on a $750 gun? [/QUOTE]
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Excess headspace - Win M70 30-06 pre-64
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