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Rifles, Reloading, Optics, Equipment
Reloading
Anyone ever seen a shot string like this?
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<blockquote data-quote="BrentM" data-source="post: 971430" data-attributes="member: 61747"><p>I am not sure I would bother with 5 powder charges. For example I find max, primer flattening, ejector marks, and back off about .5 grains. I shoot that powder weight and test seating depth. Almost always I find a node that works well. I just broke in my new barrel and have 37 rounds through the tube now. I have 3 workable loads within that test field. At 100 yards I have 5/8th, 3/8th, and bug hole. Clearly I choose the bug hole. This particular load is with a magnum primer vs a large rifle and the charge weight is .5 under where I started seeing signs of pressure. I tested at .010 for pressure and accuracy, then jumped to .100 since I have had good luck with bergers at that distance. I worked backward, to .075, and .050. .050 put the first two literally in the same hole, next one oblonged the hole. DONE. I did the same thing with a large rifle primer and shot .010 for pressure. Got a 5/8th group. Moved to seating depth test .5 grains under pressure signs. At .075 3/8th group. Clearly I can fine tune from here and have not tested .05 or .025 yet. </p><p> </p><p>My point is to demonstrate that it is probably not necesary to test that many powder charges unless you are ladder testing.</p></blockquote><p></p>
[QUOTE="BrentM, post: 971430, member: 61747"] I am not sure I would bother with 5 powder charges. For example I find max, primer flattening, ejector marks, and back off about .5 grains. I shoot that powder weight and test seating depth. Almost always I find a node that works well. I just broke in my new barrel and have 37 rounds through the tube now. I have 3 workable loads within that test field. At 100 yards I have 5/8th, 3/8th, and bug hole. Clearly I choose the bug hole. This particular load is with a magnum primer vs a large rifle and the charge weight is .5 under where I started seeing signs of pressure. I tested at .010 for pressure and accuracy, then jumped to .100 since I have had good luck with bergers at that distance. I worked backward, to .075, and .050. .050 put the first two literally in the same hole, next one oblonged the hole. DONE. I did the same thing with a large rifle primer and shot .010 for pressure. Got a 5/8th group. Moved to seating depth test .5 grains under pressure signs. At .075 3/8th group. Clearly I can fine tune from here and have not tested .05 or .025 yet. My point is to demonstrate that it is probably not necesary to test that many powder charges unless you are ladder testing. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Anyone ever seen a shot string like this?
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