I wish I could have my pet load of 10.5 Grians Blue Dot under the Hornady 200 gr. XTP 300CCI primed COAL 1.260", tested in the longer carbine barrel. These have worked real well from my S&W1006 with velocities running 1175 fps to 1200 fps.
Speer listed the 10.5 grain charge under their 200FMJ @ 1.250" and tested from the Delta Elite @1175 fps in the 90's.
It should perform quite well from the carbine barrel length!
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