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Rifles, Reloading, Optics, Equipment
Reloading
Powder lot to lot variation
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<blockquote data-quote="Greyfox" data-source="post: 1601192" data-attributes="member: 10291"><p>While I traditionally would also back off a couple of grains and would likely continue this practice with loads near max or compressed, in recent years I have found very good lot to lot consistency with the Hogdon Extreme powders, specifically H4350, H4831sc, Retumbo, and Varget. Rather then run a reduced load, I have checked new lots with a 200 yard, 5-10 shot ladder over a grain or two of my prior load. With my two most heavily used powders, three different lots of Retumbo, and 4 different lots of H4350, I have been within 10FPS With accuracy/precision within.25MOA of prior lots. I have not had as much luck with some if the other brands of powder, often finding it neccessary to make charge weight adjustments. Given this, I will make an effort to acquire enough of a powder of the same lot with my primary LRH and competition rifles but this has proven to be more difficult lately given the frequently encountered shortages.</p><p>This is my powder( and, or bullet lot change) ladder check.and 200 yard group sample of two different lots of H4350. Bullets lot changes will additionally be tested for POI(BC) at max range use.</p><p>[ATTACH]127457[/ATTACH]New lot ladder [ATTACH]127458[/ATTACH] Prior Lot [ATTACH]127460[/ATTACH] New lot</p></blockquote><p></p>
[QUOTE="Greyfox, post: 1601192, member: 10291"] While I traditionally would also back off a couple of grains and would likely continue this practice with loads near max or compressed, in recent years I have found very good lot to lot consistency with the Hogdon Extreme powders, specifically H4350, H4831sc, Retumbo, and Varget. Rather then run a reduced load, I have checked new lots with a 200 yard, 5-10 shot ladder over a grain or two of my prior load. With my two most heavily used powders, three different lots of Retumbo, and 4 different lots of H4350, I have been within 10FPS With accuracy/precision within.25MOA of prior lots. I have not had as much luck with some if the other brands of powder, often finding it neccessary to make charge weight adjustments. Given this, I will make an effort to acquire enough of a powder of the same lot with my primary LRH and competition rifles but this has proven to be more difficult lately given the frequently encountered shortages. This is my powder( and, or bullet lot change) ladder check.and 200 yard group sample of two different lots of H4350. Bullets lot changes will additionally be tested for POI(BC) at max range use. [ATTACH]127457[/ATTACH]New lot ladder [ATTACH]127458[/ATTACH] Prior Lot [ATTACH]127460[/ATTACH] New lot [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Powder lot to lot variation
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