Anything more than 40 grains of fff would be excessive in a .32, and the accuracy would be scatter gun at best, cause most .32's have less than a 1:50 twist. Pushing that little 45 grain pill over 2000fps would cause the ball to trip over the lands making for poor accuracy. My .32 long rifle with a 42" barrel gets 1800 fps with just 25 grains of fff. Personally, I think a .32 caliber muzzleloader is too small for deer hunting, to to each his own.