35, how far do you plan to shoot? Was thinking about a high BC 6mm based on your intended victims ...I mean game hunted
If you are using a suppressor that's one thing, if not, a simple 221 FB w/40s atop Lil Gun at 3600 is relatively quiet and uneventful in firing, and deadly. Very accurate, minimal recoil and noise. The say 300 Whisper has been said to be near equivalent of a 30/30 both using 125s in a 10" contender, yet with 1/3 recoil and much less blast, using as you know a pinch of fast burning pistol powder. Many choices I believe, but again your range is perhaps a major factor.
