Riverdog, I think that any of the factory-standard 240gr. or 250gr. loads should be just fine in any Model 29. By the time your bullet weight gets above 250gr., you're starting to talk "+P" language in .44 Magnum terms. The hottest "mass-production" cartridge I know is the 300gr. Federal CastCore load, and this has caused damage to Model 29's - I've seen it. The heavy hunting loads from Cor-Bon, Buffalo Bore, Garrett Cartridges, etc. are simply too heavy for ANY Model 29 in extended use, IMHO - in fact, Randy Garrett specifically marks his heaviest Hammerheads as being suitable ONLY for Ruger Redhawks and Super Redhawks.
Even the otherwise excellent Blackhawks and Freedom Arms revolvers aren't recommended for this stuff - besides which, the round's OAL might be too long for some of their cylinders.