Just noticed you're after deer. Some sort of 200+gr flat point is probably the way to go, and go for the spine or shoulder bones. Penetration won't be a problem, expect through-and-through.

I took a deer a couple weeks ago, during Thanksgiving week, with this 250gr .358 hollow point that I designed, fired from my suppressed 35 Remington. Performance was very good, with a nickel sized hole in the ribs, top of heart missing, lungs pulped, and quarter size hole out the far ribs and shoulder. Same bullet can be loaded in 38 special brass for a very quiet lever-gun load.

I have not been able to get that kind of performance from subsonic .30 cal bullets though, including my own cast hollow points.

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