I got in touch with Buffalo Arms this morning and had a nice chat with one of the folks up there. A S&W topbreak in good condition CAN shoot smokeless loads...although not recommended. It's gotta be 32 s&w sized cartridges specifically, made by both Magtech and Remington. The hazmat fee is through the roof, so he suggested I call Bi-Mart or Wal-Mart and have it ordered. I'm going to reload with bp eventually so I might just hold off on buying, "taylor-made", ammo amd invest in dies, shell's and slugs instead.......got plenty of fffg Goex on hand.