Daryl,
That's 3000 ft/lb at the muzzle. One of the events we shoot requires a minimum of 0.330" bullet diameter, min of 165 grain bullet weight and a minimum of 3000 ft/lb at the muzzle.
The Douglas barreled rifle in question is a LH Rem 700, the owner reckons he can only get near the ME limit with 275 grain Speer's and a compressed load of "X" powder.
Yet Fatboy and myself can get easily over the limit without trying.
On a real sidetrack to the original post, the 338 Federal (with handloads) is really struggling as well.

I suppose all of this is what keeps all of us buying tins of powder and different packets of bullets.

David