I didn't take a caliper type measurement but around 1/2" -3/4", three were touching and one just off. This is a tough rifle to shoot for groups when your shooting multiple loads, the barrel gets hot enough to fry an egg after 3 shots also seems to take a while to cool down.
This rifle is in a McMillan Edge, and I swapped the trigger for a Timney after attempting to adjust the Rem trigger to my satisfaction. Bolt is on the way to Karl for a knob and some dazzle.
