The handload recipe that seems to produce the best results in my 97B (in terms of accuracy and cleanliness) is a Rainier 230 gr. RN-TCJ projectile atop 5.4 gr. of Universal Clays powder, with a cartridge OAL of 1.275" and a very light taper crimp.
(You might want to post this question in the reloading forum for greater exposure.)
DL