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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
50 BMG Sabots
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<blockquote data-quote="edge" data-source="post: 122841" data-attributes="member: 5030"><p>The sabots that I am working with are similar to yours, and I am machining them on a mandrel to straighten them out. This works because I am shooting them out of a 458 win mag barrel and not a .510 barrel.</p><p></p><p>If you're only getting 3 moa accuracy then, IMO you need to see if the problem is the sabot or the powder/load.</p><p></p><p>I would want to see you shoot through stiff paper or light cardboard at varying distances starting at about 5 yards, and every 5 yards until you see clear sabot and bullet holes. As an initial test you could just shoot through a bunch of boxes lined up in a row. Any recovered sabots should be inspected for damage.</p><p></p><p>I suspect that you have a couple of degrees of bullet yaw and you need to know if the bullet/sabot combo is yawed at the muzzle or if this is happening during separation of the two components, or both ( very likely).</p><p></p><p>I suspect that since these sabots are so short compared to a 750 grain bullet that they have a huge jump before they hit your lands and they maybe badly cocked prior to hitting the bore.</p><p></p><p>The sabots that I have have petals that vary in thickness by several thousandths. For testing purposes you should measure them with a caliper and mark the high/low spots. Then hand feed the rounds so that the mark is always in the same spot. This will ensure that the CG jump at the muzzle is consistent from shot to shot instead of a random spot.</p><p></p><p>edge.</p></blockquote><p></p>
[QUOTE="edge, post: 122841, member: 5030"] The sabots that I am working with are similar to yours, and I am machining them on a mandrel to straighten them out. This works because I am shooting them out of a 458 win mag barrel and not a .510 barrel. If you're only getting 3 moa accuracy then, IMO you need to see if the problem is the sabot or the powder/load. I would want to see you shoot through stiff paper or light cardboard at varying distances starting at about 5 yards, and every 5 yards until you see clear sabot and bullet holes. As an initial test you could just shoot through a bunch of boxes lined up in a row. Any recovered sabots should be inspected for damage. I suspect that you have a couple of degrees of bullet yaw and you need to know if the bullet/sabot combo is yawed at the muzzle or if this is happening during separation of the two components, or both ( very likely). I suspect that since these sabots are so short compared to a 750 grain bullet that they have a huge jump before they hit your lands and they maybe badly cocked prior to hitting the bore. The sabots that I have have petals that vary in thickness by several thousandths. For testing purposes you should measure them with a caliper and mark the high/low spots. Then hand feed the rounds so that the mark is always in the same spot. This will ensure that the CG jump at the muzzle is consistent from shot to shot instead of a random spot. edge. [/QUOTE]
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50 BMG Sabots
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