Wow, I was tied up through the holidays with multiple commitments, not the least of which was finishing a Willys restoration, and didn't see all the great responses. Just a quick update, the offending loads (10 for testing purposes) had wet granules of case cleaning media from an attempt to use brasso. Keep the hate to a minimum! ;) Took some advice from you guys, went with a heavier crimp, magnum primers, and clean cases and got some great results. We settled on 11.5 after working up .5 grains at a time from 9. The Matt's 148 looks like this
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