I am curious about what performances are possible with loadings of 357 Mangum rounds with Black powder. I have found some conversations on this site before discussing it. I wanted to see if anyone here has experimented, or knows others who have, with BP in 357 rounds. I have a Winchester carbine and rifle and I'm curious how many grains would provide the farthest effective distance or most consistently accurate groupings of shots. I found that BuffaloArms does sell 357 cartridges loaded with BP, but it does not state how many grains. The consensus I have found so far is that 29-30 grains is the maximum amount that can be loaded, and 25 grains is what is recommended in some sources.
https://www.thehighroad.org/index.php?threads/powerful-black-powder-loads-for-357.795086/page-2
https://www.thehighroad.org/index.php?threads/ha-loaded-up-357-magnum-bp-cartridges.784916/page-2
https://castboolits.gunloads.com/sh...al-38-Smith-amp-Wesson-Special-B-P-Ballistics
https://www.thehighroad.org/index.php?threads/powerful-black-powder-loads-for-357.795086/page-2
https://www.thehighroad.org/index.php?threads/ha-loaded-up-357-magnum-bp-cartridges.784916/page-2
https://castboolits.gunloads.com/sh...al-38-Smith-amp-Wesson-Special-B-P-Ballistics
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