If it is I have never noticed it. I think it is mild and when shooting at a deer I don't even remember it going off.Congrats on the deer!
That has got to be a real flamer thrower with that short barrel and rifle cartridge.
Yes it is a 10", used to be a 14".
I used the Sierra 130gr Single Shot Pistol bullet that they quit making several years ago. They were designed to expand at handgun velocities.