check for yourself but i notice in all data with same weight bullet charge weights are different, some as much as full grain. i seem to think unique burns a little faster than bullseye. sometimes u find an older powder, with the same charge weight as a newer powder, i seen this yrs ago with win action pistol and ramshot sillouett excuse my spelling, but every load in every caliber with every bullet weight was he same. I scored a dozen new 1lb cans of the win action pi for a great deal. found out it was a popular powder for race guns back in the 80s or so. .A represenative from ramshot told me in a email that it was one and the same, they bought powder surplus from winchester when winchester droped some of thier powders years ago. I read one time all the powders we use starts out as military surplus, after a war such as ww2 , vietnam etc.. they sell off surplus to other companys. this is how hodgegon started in bussiness. Then these companys test the burning rates in labs and record data. they buy these powders by the tons. i reload my ARs with milatary surplus i bought in 7lb cans from hitechammo couple yrs ago and its similar to reloader 15 and others, they tell you this on the site. difference is they use the milatary name which is in numbers and letters. hey explain that u should reduce load then work your way up till you get the recipe, i found its close to what they compare it too. So far its always rifle powder, for say 223, 308 and 50cal. never was able t find handgun powder like that yet. i havent bought from them in a while i remember they were based out of St.Louis, hope there still in bussiness , although i seen other companys doing it also lately like widners i believe.