"What model number is the one on top?"
It's a 444SS, which has conventional rifling, as do all the other guns. The BFR is a pussycat, really. Now the Lone Eagle was almost unbearable till I put the brake on it.
I don't have a 405 gr. mold, but SuperMag's boolet sure looks nice. I know 6pt-Sika has come up with a couple nice 375 & 400 gr. designs. My favorite load is a 300 Speer soft point over 48gr. H322. The only boolet I have is a 300 gr. WFN.
"So I don't really see the reasoning behind your post ."---All in fun I'm sure, but of course those baby's are some of my most prized (not for sale!), and 2 are no longer made.
I think 44 Mags are great, by the way, but........