Re: 60 gr sub ammo
I have the fast twist on a Ruger 10-22. Without a different stock, it will be so-so accurate. That said, I have mine zeroed at 25yards, as that as is far as I needed to be for the purpose of that rifle. The rifle is fully capable for all head shots at that range.
You can find the 60g Augila for less than $40.00 per a brick of 500. The 60g's will cycle the Ruger 10-22, but it will get dirty fast when suppressed and start to mis-feed/stove pipe. I have had the 60g's zip through raccoons more ofter than naught, and with those "pass-throughs" make damn sure what's beyond your critter.
That said, a 40g will cycle almost any semi when suppressed secondary to the additional back pressure.
If you want stupid quiet, use a bolt action and a 40g standard velocity. I have never had the need for multiple shots were a semi was needed. Maybe I am too slow, but if there is more than one raccoon, the sound of a bullet hitting bone/meat will scatter them quicker than I can get off two shots at different critters (at that close of a range).