With 40 inch barrel 416 HSM ,475 gr, get 3650, over 13,000 ft lbs muzzle energy.
Got guys getting set to have 38-40 inch 458 barrels made for 460 HSM.Ed..

More info on this gun, we did it for testing 416 HSM with a rebated rim,
to check in intermediate size actions, with the longer, stronger, bolt lugs, Ed..

Here is experimental action for 416 HSM in a heavy
stock....We lengthened port a little, set bolt stop back ,
opened bolt face fit the 416 HSM rebated rim. Ed.

Here is comparison of Montana PH to Pierce action we
modified to use for rebated rim 416 HSM testing..Ed.

416 & 460 HE AND 416 & 460 HSM .LONG RANGE AND HUNTING
Can be set up in  Pierce  X10  ACTION for the 416 & 460 HE  
AND X20 action for the 416 & 460 HSM , Can get those
if guys need one...Ed

Here is picture of my 416 HSM test gun,... It is a big falling block we had
as a 8 bore years ago. Has a 34 inch , 1 5/8 "diameter, 1 to 10 twist barrel. .. Ed.

Also set up test barrels for the falling block for 460 HSM and our 585 ..Ed

For those following this thread I wanted to share the news that Ed Hubel passed away on Nov 5th. While I never personally spoke with him I have built one gun chambered in his .585 Hubel cartridge.