If you are searching for low pressure loads, you should start in the loading charts that are available from all powder manufacturers on their internet sites. I like the Alliant site. The best place to start in searching for low pressure loads, safe for older guns, steel or composite barrelled, is in the lower shot weights per gauge. By lower shot weights per gauge, I mean 1 1/8 ounce for ten gauge, 7/8 ounce for twelve and sixteen gauge, and 3/4 ounce for twenty gauge. If you want to shoot heavy shot loads, the search and the knowledge bank gets a bit more difficult to confront.
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