40-50 Smokeless

[Don McDowell]

Old rule of thumb taken from ancient load manuals, say to start at 25% and go no higher than 45% of the black powder charge when using 2400, and 30% not to exceed 50% of the blackpowder charge with 4198 and 4227. the same could probably work with 5744, but staying on the lower end probably be the best.
My 40+ year old Cartridges of the World list 21 gr. of 4198 with the 260 grain bullet.