Interesting, folks thinking big bullets give bang flops.
I got a 50 beowulf... have taken probably 10-15 animals with it. have yet to see a bang flop.
Never mind bang flop is related to bullet placement, not caliber. IMHO.
over the last 50 years I have seen more big bullet bang flops than with 30cal or less. and I have taken at least 3 big game animals per year. lots of bang flops. ymmv