I just tried out some fairly warm loads- 38.0 Blc-2, 113grs of H2O quenched W/W sized .313" (apx 2,500 fps) in a new to me "Antique" Finn M9. Held under 2" @ 100y with bbl sights.
I have 2 others that I have shot a lot of cast Lee 185-.314 & 16.5-2400 that are pretty accurate (1-1/2 Moa- irons).
Don't know for sure what that big meplat would do on deer, but I suspect it would do the job at that velocity.
Shot a few 185's with 60gr 3f black powder just for grins.. so-so..