hansol- you will not like to shoot a load of BP that runs that ball up that high. Even 1,500fps to 1,550fps, takes 7 drams - a full 191gr. of 2F - not 1f, which gives lower speeds. Smokeless powders in the 7625 and 4756 range meet that speed easily and with low pressures - 1/2 the recoil - I figured.

You might get up to 1,700fps with about 240gr. of 2F - but would require a 3" case to do it - probably, as there must be room for requite wads for sealing and to help with accuracy.