Jeff, there are hundreds of low pressure loads, most lab-tested, in the Low Pressure Group section of 16ga.com’s reloading section. It can take awhile to get registered—the manager is a busy volunteer—but stay after it. The spreadsheets they have assembled are an incredible resource for those of us with old, short-chambered guns. They ask for a $20-25 registration fee, and they encourage members to send in new loads for testing by Precision Reloading or Tom Armbrust and share that data. Best money I’ve spent in awhile.
