The Ideal/Lyman 429421, or RCBS, H&G or any other good clone of that bullet is hard to beat. The 250 gr RCBS version is supposed to be closer to what Keith originally designed. IDK if it is, but all of those I have shot, were equally good. I ended up buying the Lyman 429421 in the end, just because I got a good deal on it. I size mine as fat as possible, that still fit my cylinder throats. Right now I'm without a 44, but from memory my 29 seemed to like 0.431" bullets, and my Redhawk liked 0.433" bullets. Find what best fits yours.