I have a 10" plus a muzzle brake. Current load is a 300 grain HP @ about 2000 fps. Practical accuracy is OK. It seems that any change in my grip or trigger release, moves the impact around a bit more than with other, lighter recoiling firearms. I have a 2x Leupold on it, which also depresses the accuracy a bit when ranges lengthen. However, it is plenty accurate when I do my part, I think it's just a big boomer and not the easiest thing for me to shoot well every time. I suspect that it is shooting better than I am. I can generally get 5 into about 4" or less @ 100 yards off a rest. PLENTY good enough for its intended use, and an excuse to practice with it more often.
A blast to shoot --- literally. It is VERY loud and about takes my ball cap off. I wear 2 game ears when hunting with this and other handguns for ear protection without losing my ability to hear as when using normal plugs.
Enjoy it!