This is one of the best groups I have ever worked with on any forum. Maybe it's because of the perfect solutions based on real world shooting. I will be working towards a short 10 crow load next, but, for now, let me report.
Eric, I don't know why I didn't think of dropping an additional .125 16 gauge nitro card directly on top of the 1/2" in filler, but, I didn't. I did put on over the shot to check for fit, but, it became too high. Now using SP-10 + 1/2" 16 Gauge filler wad + .125 16 Gauge nitro card + 1 1/8 oz MEC bar to deliver about 475 gr of 7.5 magnum shot. Guess what, Perfect Crimps.
I bumped up to the MEC 33 powder bushing to try to gain a little height + a little charge weight. For me it is throwing 19.5 gr of Red Dot. Since I have now adopted the extra nitro card, I am going to pattern the 19.5 gr load, then, go back and pattern MEC 32 powder bushing load (about 18.7 gr) and see if there is a difference.
I tried to chronograph some of the 19 gr Red Dot loads and couldn't get a reading with my MagnetoSpeed "on barrel" type chronograph. I guess I gapped things too far, but, I am really afraid to shoot this thing off the barrel by accident.
Thanks to all who make this forum great. The short 10 appears to be a really great round, and loaded at the 19 gr Red Dot level, makes my 10 a year around gun.
rch
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