I'm having Accurate Molds make me a ~160 grn FN, as well as a FN bullet that's only 0.460" OAL, which ought to fit nicely under the rammer. I'm assuming it'll weigh nearly 200 grns.
What do you intend these bullets to do? If just punching paper the Lee conicals are much cheaper.
The Pietta's (not the Shooter's Model), I understand, have slow twists with RB's in mind, and I hear that longer bullets/conicals just don't do so well in comparison. But I'd imagine that a bullet roughly the length of a RB would do quite well, as would the ~160 grn bullet that's something like .410" OAL.
I'm saving up the last of my coins for this mold (5 cavity with 3 designs). He designed the first 2, and then reworked them a bit as I didn't know exactly what I was wanting. His 2 renditions aren't precisely what I have in mind, and so I'll have him change it when I order as he's not fond of reworking them without payment. I'll also be adding a ~270 grn FN for hunting things that might want retribution.
Here are the bullets as is now:
http://accuratemolds.com/bullet_detail.php?bullet=45-160B-D.png
http://accuratemolds.com/bullet_detail.php?bullet=45-180S-D.png
I intend on having the me plats widened, the driving bands elongated, and the base diameter changed to .445".
I'm intending on reaming my Pietta '58's chambers to .450-.453" so that I can share these bullets with my ROA, and because they are undersized to begin with, and I've read too many accounts of improved accuracy.