fillae
First off you need to know that I am not a powerbelt fan even though they are made here in Idaho, so you need to take my remarks in that since.
PowerBelts in my mind are nothing more than elongated round lead balls. They can be very effective and they can also not be so effective. They do make a Powerbelt that does not have a HP it a really heavy variety. The HP is not the issue for me - it the fact that hey can blow-up if shot at a high rate of velocity. I also have an issue with the thickness and the toughness of an Elks hide, then the size of the bones... A lot of elk have been killed with a Powerbelt - I am or would choose the 460 on the basis of shear weight and force that the projectile carries. I also understand that my effective range will be reduced.
I also share your belief that a HP will not penetrate as deeply a an old fashioned bullet. In Idaho we can use sabota and a regular bullet - so for elk here I shoot a 300 grain Nosler Partition to insure penetration and no blowing up.
I am not the expert on lead or powerbelt bullets as I use regular bullets, but there certainly are some good ones on here. Hopefully cayugad or UC will come back on and discuss the 460 with you...
mike