Apparently your mind is made up.
From experience, I used one for score comps., straight taper 1:7.5 and at 1200 rounds accuracy started to go away, at 1300 it was good for a hunting barrel but not 1/2" circles at 100 yards. The first 2.5-3" of barrel were toast, the barrel lasted 2 seasons.
Do as you may, but you did ask for opinions do some more research.