when you can get 165 grs to 1450 fps (safely) in a Commander, why not 70 grs to 2300 fps, hmm?

Especially with the advantage of an extra 2 grs of powder that fits in a huge conical base cavity. you wind up using so much Bullseye that it petrifies most reloaders to think about it. (think 11+ grs in the .460 case) but the really lw bullets get moving so easily that the firing-pressures drop like a rock. having a 4" .44 mag's 800 ft lbs on tap, with LESS recoil than .45 ball, in an alloy Commander seems surreal, but it's quite feasible to attain with the hollowbased, solid copper 70 gr hp .45 bullet. The skirts of the hollowbased bullet compress easily as the bullet goes down the rifling, which reduces pressures, too. There's very little of the bullets sides in contact with the rifling.
Removing 1" of the rifling in front of the chamber, allows the hollowbase (hb) skirts to open wider, letting the bullet get moving even easier, allowing the use of much more powder, getting about 950 ft lbs out of a commander, (70 grs at 2450 fps), while retaining the same recoil as .45 ball ammo. The blast and flash are stupendous, of course. The ignorant are 'certain" that this can't be done, but the facts show otherwise.