Here i thought it was, it had to retain 1,000 foot pounds of energy at 100 yards ( but i could be wrong lol , bad memory)
for big game/ elks is pretty big.

If so that leaves out most 44 mag loads etc& for sure 357. even in a rifle.

A 30/30 is lot more then most of those? dont know about the cassuall tho offhand.

A 45. colt ( or acp)be a big hole to but i wouldnt hunt with it... but a 45.70 etc wuld work much better.
or other rifle calibiur
...Ok looked it up...lol its 500 ft lbs , at 100 yards. seemed like a 1,000 was high