Ross typically builds his SP's with barrels longer than 18".
But I just can't bring myself to cut the barrel down when it has less than 200 rounds through it.

The Lone Eagle is a fairly light weight SP, and the 06 can have some noticeable recoil. Again, a good muzzle brake will surely help.
Also, you might give yourself a little break if your hand/wrist area is aggravated.