Just curious if anyone has had luck with the factory load Barnes TTSX all copper rounds for hunting Whitetail using a 30-06 and in what weights.

I was given a box of 180gr but from what I have read when hunting whitetail from a 30-06 they might be too slow to open properly so I am not sure I want to use them and risk losing an animal.

Seems like some people swear by them and some people hate them.