DrMike":ko5z6pg3 said:dewey7271":ko5z6pg3 said:Isn't Norma MRP supposed to be similar?
Dewey
MRP is not RL22. At the very least they are drawn from different lots of powder. They are sufficiently similar in burn rate, however, that you won't be unduly hindered in working with MRP if RL22 has served you previously.
It looks like 7828, RL22, and MRP are all very close in burn rate, and should probably be useful in all cartridges one or another has been used. I would feel really good about having 8lbs of any of them at this point.