280 gr LBT LFN GC. I may need to go to a lighter bullet, heavy recoil from shooting "train stoppers" is starting to make my hands shake. Tis' a pity. I have an NEI 429310 I've only test cast with so far, waiting in the wings. Maybe I can keep shooting it just until I need physical therapy? If I could have only one bullet for what I'm doing now, I think I would settle on Lyman 429244 260 gr GC, and not worry about it anymore.
The recoil isn't anywhere near as bad as when I bought the first 45 Colt Redhawk anybody around here had ever seen. I loaded Lymans 452651, seated long (it was a Redhawk after all), with old school WW 296, I recently found my old chrono notes- velocities averaged around 1320 with a 325 gr bullet that actually weighed about 10 grains more, fired from a 6 shot revolver, not a five shot. Recoil was spectacular! The gun would torque and flip like a stunt plane
and end up over my head, pointed behind me. You can find pics of gunwriters shooting 454 Casulls doing the same thing. Those were crazy days, I would shoot at 4 inch long pieces of 2X4 that I'd throw into the creek. A near miss would launch them into the air, a hit would drive them under water, and they'd surface in pieces. This was back in my immortal days, I'm much wiser now. Boring, but wiser. I realized that I was going to blow the gun up if I didn't quit, so I traded it off after awhile.
BTW, to answer your original question, I'd run the Keith bullet, or the Thompson 452490 if you want a gascheck. Much is dependent or your particular needs Either of these two will outperform 454190 in almost every way except if "originality" counts. As you've seen, my only used for 454190 has been for the 45 ACP.