10ga Test Results Red Dot & Cheddite CX 2000 primer

[J.B. Books]

Originally Posted by Craig Larter

The load I had tested a few years back with 19gr Red Dot, Cheddite hull, Winchester 209, 1 1/8oz lead, results were 6866psi, 1140fps.

I had the a load of 17.1gr Red Dot, Cheddite hull, Cheddite cx2000 primer, 1 1/8oz of lead, results were 7700psi, 1137fps.

Loaded test sheet below. I am finding with the cheddite cx2000 primer I need to reduce powder to obtain similar pressure and velocity to my old WW209 and Rem209 primer loads.

Craig, I would like to be sure of the components you used for the 10ga spreadsheet. It says SP10 wad and (3) 16ga, what size 16ga filler wads? It also says a .0125 nitro card as buffer. Was the nitro card under the SP10 or inside the shot cup of the SP10?

Thanks in advance.