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Rifles, Reloading, Optics, Equipment
Gunsmithing
FN SPR Bolt Face Dia. Possible?
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<blockquote data-quote="J E Custom" data-source="post: 644062" data-attributes="member: 2736"><p>I would recomend not doing anything to the Existing bolt and replacing it with new bolt with the </p><p>proper bolt face.</p><p></p><p>If you try to reduce the bolt face you have to weld or silver solder a insert and then machine</p><p>it out to the correct size.</p><p></p><p>Silver solder has a melting temp of 1100 to 1200 degrees and welding is 4000+ degrees and </p><p>ether method will remove some of the strength(Anneal the bolt face and the lugs) and in order</p><p>to recover the strength you must re heat treat the bolt, and subsequently you will lose the silver</p><p>solder.</p><p></p><p>On odd diameter bolt faces I will buy an aftermarket bolt with a smaller bolt face and open it </p><p>up. This does not change the temper of the bolt and makes the bolt face diameter very </p><p>controllable and precise. also the extractor cut is easy to do.</p><p></p><p>There are some other cartriges that have a standard bolt face like the 308 but are less powerful</p><p>and would be easy to change without any modification to the bolt,action or Magazine. For </p><p>example= 225 Winchester, 22/250, 6mmBR, 260 Remington. ETC.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 644062, member: 2736"] I would recomend not doing anything to the Existing bolt and replacing it with new bolt with the proper bolt face. If you try to reduce the bolt face you have to weld or silver solder a insert and then machine it out to the correct size. Silver solder has a melting temp of 1100 to 1200 degrees and welding is 4000+ degrees and ether method will remove some of the strength(Anneal the bolt face and the lugs) and in order to recover the strength you must re heat treat the bolt, and subsequently you will lose the silver solder. On odd diameter bolt faces I will buy an aftermarket bolt with a smaller bolt face and open it up. This does not change the temper of the bolt and makes the bolt face diameter very controllable and precise. also the extractor cut is easy to do. There are some other cartriges that have a standard bolt face like the 308 but are less powerful and would be easy to change without any modification to the bolt,action or Magazine. For example= 225 Winchester, 22/250, 6mmBR, 260 Remington. ETC. J E CUSTOM [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Gunsmithing
FN SPR Bolt Face Dia. Possible?
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