Lyman Handbook, titled Pistol and Revolver. The one with an article from Hank Williams Jr. in it. Page 202-my favorite load is 35 gr. of 1680 with a Lyman cast bullet(no.429640), mine come out at 280gr., Fed. Lg. Pistol primer,mag., (no. 155) Starline brass. I know your not shooting a cast bullet. Same manual,300gr. jacketed, 35grs. is max, suggested start load is 31gr. with that bullet. AA1680 just always seemed to give me alittle better accuracy.(gun is a 10'' Dan Wesson)-gypsyman