Dave - I agree that the difference is small; but some limited accuracy testing I did a number of years ago suggest that volume isslightly better - at least when using Pyrodex RS. I did my volume dispensing with a benchrest modified Lyman 55 powder measure though - which I'm sure throws more consistent charges than the usual trombone-tube MZ powder measure. Also, FYI - I did a little playing around with the chronograph and determined, at least from a single limited sample, that two Pyrodex pellets have a slightly narrower SD of velocity than 100 grains of loose powder (measured by volume). The difference gets greater as the charge goes up. With 150 grain loads, the pellets had more than just a slight advantage.