David,

While not the same bullet,the Lyman 325 gr 429649 with an OAL of 1.700 (in the 44 magnum case)should give you a start.According to Lyman.....

Starting load...13.7gr 2400...812fps...24,100cup

Max load....16.3gr 2400.....1008fps....37,000cup

From a 4" vented test barrel