Subsonic deer hunting question

[hugginsvilleH&A]

my 17 hmr sounds like a freakin 30'06 , man that thing is LOUD

[m21black]

I have taken deer with my 300 Whisper both with body shots and head shots, none walked more that 50 yards half piled up in their tracks. I use the 240 grain SMK with 9.2 grains of H110. Longest shot was 80 yards. The 240 grainer tend to yawl over on contact and makes a nasty knifelike exit wound. Shot placement is key but than again isn't always.
As far as the LEO using it I will refrain from comment.