Should see my first Grendel next week...

[6BRshooter]

I had a M700 5R milspec in 308 that shot decent but coppered real bad. The rifling looked like the edge of a bastard file in fact. I ran the 3 finer bullet sets from a tubbs FF kit through it. Accuracy did not improve, but the cleaning chores were greatly diminished. All the bullets do is slowly smooth out the chatter marks produced in a factory barrel. If it is from LW, Bartlien, Krieger, or Brux it is not needed. I say shoot it and let the results tell you what you should do. Just keep in mind that it is not going to make it shoot any tighter, unless it is rusty and pitted up, which it should not be .