Meat,
My rifle is a 243 Winchester non-combo rifle. The o ring would not work on my rifle. I cut an oval washer out of some 1/16" neoprene and placed it over the barrel stud. I then used a piece of dental floss to see if the forend was touching the barrel in any other places. i sanded the barrel channel where necessary to relieve contact with the barrel. Clean the bore well. Mine had a lot of black crud in it and I had to use a bronze brush to get it out. My barrel was a little rough and it took about one hundred rounds to break it in. Factory ammo will group around 2.5" at 100 yards in my rifle. Hand loads will group 1.25" to 1.5" using Remington 100 grain cor-lock bullets.I did not try any premium bullets to see if I can get a better group. I got this rifle For $149.95 including scope. I have no complaints about this rifle and I do not expect to get any more performance out of it.
Stress