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Rifles, Reloading, Optics, Equipment
Reloading
powder charge vs velocity
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<blockquote data-quote="jsthntn247" data-source="post: 654225" data-attributes="member: 14894"><p>I don't have a clue what the book max load states for that bullet and powder but what I can tell you is that you have reached max load at 50.5 for your barrel/bullet/powder combo. This is the main reason to use a chrony when working up loads. You are seeing lower velocity in the two higher powder charges because of inconsistent powder burn. I had the same thing happen with my 7mag and H-1000 in a 24" tube. Book max charge was 70 grains, but I started getting incomplete powder burn after 68.0. All charges from 68.5 to 71.5 hit within .5moa in my 300 yard ladder test but the load I settled on was 67.6. When getting incomplete powder burn, you will almost always see your E.S. numbers all over the place and unexplained fliers. If the 50 or 50.5 had the same point of impact on the target and decent group sizes, I would play with seating depth and try to find a load with either one of them. Hope that helped.</p></blockquote><p></p>
[QUOTE="jsthntn247, post: 654225, member: 14894"] I don't have a clue what the book max load states for that bullet and powder but what I can tell you is that you have reached max load at 50.5 for your barrel/bullet/powder combo. This is the main reason to use a chrony when working up loads. You are seeing lower velocity in the two higher powder charges because of inconsistent powder burn. I had the same thing happen with my 7mag and H-1000 in a 24" tube. Book max charge was 70 grains, but I started getting incomplete powder burn after 68.0. All charges from 68.5 to 71.5 hit within .5moa in my 300 yard ladder test but the load I settled on was 67.6. When getting incomplete powder burn, you will almost always see your E.S. numbers all over the place and unexplained fliers. If the 50 or 50.5 had the same point of impact on the target and decent group sizes, I would play with seating depth and try to find a load with either one of them. Hope that helped. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
powder charge vs velocity
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