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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Anyone using PVA Cayuga bullets?
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<blockquote data-quote="codyadams" data-source="post: 2355347" data-attributes="member: 87243"><p>I'm no expert, but with a 177 Hammer in that massive case, I personally wouldn't go any faster than IMR7828ssc, Ramshot Magnum, or H1000 type powders. Honestly I think H4350 is way too fast (possibly even dangerously so) in a 7mm case with 122 grains of H20 capacity....I understand Hammer bullets generally can run with a little faster powders than your typical bullet of the same weight, however in the several rounds I have loaded with hammers you can generally use your standard powders with great results, I used H1000, Retumbo and even N570 for a 285 Hammer in my .338 Norma mag and did not run out of case capacity. Using faster powders lowers your case fill, which can often lead to higher e.s., which may not matter if your max is 500 yards, but for reaching out there, it isn't a good mix. And in the extreme case of H4350 in a 7 AM, the possible low case fill in such a large capacity cartridge might be in the neighborhood of leading to a very dangerous ka-boom type situation. I would strongly recommend talking to Kirby on powder choices for his cartridges, he will know better than anyone else on this forum. Even H4831sc, while completely acceptable and a decent choice, is on the quicker side of burn rate for a 177 in a standard 7 remington mag. Now add 40 grains of capacity and go to an even faster burning powder.....just be safe! And talk to Kirby ha ha.</p></blockquote><p></p>
[QUOTE="codyadams, post: 2355347, member: 87243"] I'm no expert, but with a 177 Hammer in that massive case, I personally wouldn't go any faster than IMR7828ssc, Ramshot Magnum, or H1000 type powders. Honestly I think H4350 is way too fast (possibly even dangerously so) in a 7mm case with 122 grains of H20 capacity....I understand Hammer bullets generally can run with a little faster powders than your typical bullet of the same weight, however in the several rounds I have loaded with hammers you can generally use your standard powders with great results, I used H1000, Retumbo and even N570 for a 285 Hammer in my .338 Norma mag and did not run out of case capacity. Using faster powders lowers your case fill, which can often lead to higher e.s., which may not matter if your max is 500 yards, but for reaching out there, it isn't a good mix. And in the extreme case of H4350 in a 7 AM, the possible low case fill in such a large capacity cartridge might be in the neighborhood of leading to a very dangerous ka-boom type situation. I would strongly recommend talking to Kirby on powder choices for his cartridges, he will know better than anyone else on this forum. Even H4831sc, while completely acceptable and a decent choice, is on the quicker side of burn rate for a 177 in a standard 7 remington mag. Now add 40 grains of capacity and go to an even faster burning powder.....just be safe! And talk to Kirby ha ha. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Anyone using PVA Cayuga bullets?
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