I shoot a 570 gr arrow at 270 fps out of old chill r. No experience on moose yet, but great results on many bull elk and a few bucks/bears. Ive used many different broadheads from gravediggers to magnus buzzcut stingers, trypans, exodus, valkyrie 150 gr. with excellent results. I shoot a 250 spine xtorsion 13 gpi. 570 gr. Fly great and pin gap isnt too big with a 5 pin slider. Might try a 620 gr. Arrow this year topped with a two blade 150 gr killer bee buzzcut. I bought them for my tradbows, decided to shoot a few out of the compound. They fly like field points and im sure they'll have great penetration. Need to chronograph them.
The key, I believe, is a heavy arrow at a good speed. They carry more momentum at distance and judging by the "arrow energy" calculators online, most of today's 70 lb. Bows produce upwards of 90 ft. Pounds- enough to kill an elephant.
The 650 gr. Hype is real. My buddys brother from Missouri came up archery hunting elk a few years back. He is an ER doctor and combat veteran. Awesome guy. He purposely shot his bull in the knuckle of the front shoulder at 50 yds. Quartering to. 650 gr. Grizzlystik topped w/single bevel massai. Out of mathews halon. Arrow blew threw the middle of the shoulder, breaking through the heaviest bone and completely passed thru- he couldn't find the arrow! I shot them, but ended up having bad groups past 50-60 yds...and the pin gaps were big/arrow flight slow. Ive used trypans with perfect flight out past 90. Pick ur poison, and shoot straight