You can't be too careful, Brent. I have a good friend who was given a C. Boswell damascus gun, with 2 1/2" chambers. He modified a 2 3/4" MEC to load the shorties, then proceeded to use Unique in compression formed hulls. I warned him about keeping the pressures low, and suggested other powders that would be better suited. He believed that there was "wiggle room" with the loading data, and proceeded to blow the chamber out of a fine doublegun, ruining it. He contends to this day that it was a stuck basewad.
Point is, powders make a huge difference. Heck, even switching primers can change pressures as much as 3000+ LUP. Sometimes it's hard to be patient, but it really is worth the wait to get data from Tom on an untested load. I'm not trying to be a smart-aleck, I just want to see you do well with the loads.
SRH
