Shot my BIL's wounded cow elk at 475 with my 270TI with a 6x36 with turrets. that's the only time i've ever needed to shoot that far since i started using turrets. I shot a cow elk when was 16 at a guesstimated 600 (pre LRF days) with an 06 with hold over, it weren't pretty but got the job done.

YMMV

I can't spell... Deal with it...