While I have not tried Red Dot, Clay Dot is very similar. Thus I offer this Tom Armbrust tested 10-bore load for comparison:
I use the RST (Federal) 2 7/8” hull, 21.1 grs. Of Alliant Clay Dot, Winchester 209 primer, a BP VP 100 one-piece plastic wad, one 16-bore .135 nitro card and one 3/8” fibre wad for cup fill, plus 1 1/8 oz. of No. 8 shot. According to Tom Armbrust of Ballistic Research, this load generates an average 7,640 psi. and 1,217 fps. velocity. That surpasses the RST Lite cartridge by only 67 fps.
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