H version is somewhat faster than the I . H4895 can be safely reduced to 60% of a max load , not only for cast but jacketed too . Both versions are quite flexible , easy to work with , quite accurate . Like Unique you can find a load for dang neigh anything & it plays well with cast bullets . If you like milsurp stuff it & 4064 are hard to beat . I shoot it with cast bullets in 6.5 X 55 , 7.5 X 55 , 7.62 X 54R , 30/06 , 303 Brit , 8 X 57 . Give Hodgon's a call & speak with them about downloading I 4895 , I suspect it's possible . Neither are hard to light & exhibit linear progression pressurewise . At one time IMR published loading data for every powder they made in just about every caliber with velocity & pressure data .