Came into about 1/2 a bag of #7 1/2 shot recently. If your familiar with the Speer capsules for handloading shotshells, you probably know that #9 or smaller shot is recommended. There are positives and negatives in regard to using the capsules, usable space being the issue here with the slightly larger shot. I have the Speer #11 manual for data and W231 which is one of the powders they used. Velocities in the #11 came from 6" revolvers with the capsules in .38 Special cases. 5 grs of W231 got them 996 FPS and they say you should expect a 150 FPS loss, firing from a 4" barrel. My lucky dog of a shooting partner won a 1 chance in 80 raffle last week for a new S&W 4" 686+ 7-shooter and it shot like a gem on Friday. I'll be shooting a 4" GP100. I'm not looking for 12" patterns at 12', I'm more interested in getting the heavier pellets to saturate evenly throughout the pattern.
This will be about trying to get more shot in the case without using the capsules. In the past I had considered using .357 Maximum cases and putting a star crimp on them like blanks get. But since most of us that shoot .357 Mag have cases, they seem a bit more practical than buying 100 .357 Max cases and I don't have the start crimp die. I've been kicking around ideas about wads, and mat'ls to make them from. I've only done a few preliminaries regarding powders and the amount of space they'll occupy in the case. I have enough, but not a lot of W231. Plenty of AA No 2 and as much as I recommend Ramshot True Blue, it could provide the highest charge in regard to the space it occupies. It is very dense and fine grained while No 2 has the lowest density of these powders.
But here's the catch. I may get an article out of this for the Western blog, but I thought if there's an interest here, and replies to warrant, or tips from handloaders who have done something similar, the discussion and techniques I'll use could be kicked around as I go from start to finish firing them at the range and making adjustments to the powder charge or experimenting with different wad mat'ls. Or if you've loaded with the Speer shot capsules, feel free to post your results. If no one is interested in this other than myself, the thread can fade away, and/or become an article for the Western blog, provided they are interested.
First step when it warms up a bit here, selecting the powder and wad mat'l. Pretty sure the top wad will be a translucent plastic.
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