I have read that type of review quite often....I know the Shiloh has a much deeper and sharper cut to it's rifling. Wonder if these big gooves cut into the bullet and hinder its' accuracy. The really large cuts have to distort the tail of the bullet and cause more spin-drift.
After comparing my Pedersoli rifling to the Shiloh, I called Lee Shaver to have a new barrel installed, but he convinced me...."If it ain't broke, Don't fix it"
I can't believe how subtle my rifling is and it still shoots well, even with Black Powder. The riling is easily 2 to 3 times more proud in the Shiloh.