I can't find 700X to load Gold Medal plastic's. There seems to be no published loads for Promo for the GM's but there is for Red Dot and there are loads for GM's with Red Dot. According to the burn chart Red Dot is just a smidge faster than Promo. Does anyone substitute Promo for Red Dot or 700X.
Promo is blended to have the same burning rate as Red Dot. It will not use the same bushing because of the different densities. If it says to load 18 grains of Red Dot. Find the bushing that drops 18 grains of Promo. The load will then be the same.
Make sure to weigh the powder charge, Use Red Dot grains or look up the PROMO data.... its starting to be in more and more loading information... Larry
What ever your Red Dot data says, use the same Promo.
BUSHINGS may change though. That is what you have to make sure of. make sure your Promo is dropping 18.5. 18.5 in Red Dot may not be 18.5 in Promo.
This is tub for tub too. Every new tub you may have to change your bushing.
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