If the law allows, 27# will work for a lot of game. I know a young lady who has killed a few whitetails pulling around 25# on a recurve. Excellent arrow flight, very sharp broadhead, precise shot placement. Not extremely close shots either--one large doe--over 100#--was killed at 26 paces (her dad's paces--basically 26 yds).
I agree with not using plain blunts on anything. I saw a grouse shot with a 65# longbow square in the chest with a rubber blunt. The bird fell a couple of feet, righted itself, and flew off.