sealegs,
Excellent!
And that first line of "recommended cartridges" drives home what we say around here; most New England moose are killed by .308s, .30-06s and .270s. You DON'T need a cannon. Having tasted the results of a successful hunt (and seen it filling the bed of a pickup), I know that the '06 works!
FWIW, I've read that elk are more shock resistant than moose, however. Never met an elk hunter to verify that though.