Problem rifle

[Kurt]

laowho
When I shot bench rest and small bore silhouettes we used to make barrel donuts to tune the barrel harmonics and they worked for tuning the barrel vibrations to reduce groups by fraction of an inch. I never made one for a black powder rifle to see just how much of an impact it would have. But you can do just about the same thing when you use cross sticks where you place the barrel. It's not hard to find the null in a powder rifle and some place the sticks where the null is, but I don't think that is the full answer. Sometimes just sliding the barrel for or aft from the null shows a improvement.
One wouldn't think at the low pressures of black powder in the heavy barrels 1" thicker or more it would show up. But it does.