The ballistics charts at Cor Bon says the 460 S&W has
1750 ft.pr. sec. and 2041 ft.lbs. energy at muzzle
7 mm, mag has 2925 ft.pr.sec. and 3040 energy.
The 7mm. mag @ 500 yds. has 2085ft.pr.sec. and
1545 ft.lbs. energy. as for the 460, could not find
any specs. beyond muzzle. For a pistol round the
460 looks like a bad azz, but at 200 plus yds. it
cant hang with a rifle.