I normally shoot the RCBS 200gr. bullet in my Handi (chamber lengthened to take max brass) and my Browning B92. Any of the slower pistol powders will work fine, lately i've been using Lil' Gun with good results in both. BTW, in the Browning I use 38 spl brass, and load to the same OAL as a 357 mag. Have to do that to get it to feed, in your handi it won't matter. Those have really long throats, if you seat the bullet out to touch the lands you might not have any left in the case. Load accordingly.