They give you a gauge to keep you from doing it lol.That's what happens when they say get it as close to the bore as possible lol. They seem to work good, but seen many guys working up loads with it on the barrel. I'd bet it would make a group shift for mess with the node some.
time to build a little flat bed for the truck,
im pretty sure it loosened up or i forgot to gauge it, course the 44 might have just pulled it up into the bullet im not positive how it happend, just that it was embarrassing.
they do mess with poi, but from what ive seen group size seems to stay the same.
I might flat bed the truck, i got the lumber and angle iron for it.