In comparing the 66 cal ML with a hard ball cast of wheelweights to a 458 solid (as Taylor would have), the primary differnces will be frontal area, velocity, and sectional density. The higher sectional density of the 458 bullet would tend to penetrate deeper, the greater frontal area of the ball would make a larger wound channel, and velocity could go either way. Higher velocity often causes less penetration, but not always.

Anyway, the comparison was made in fun.

Take care, Tom