So while I'm waiting for a stock inletting tool to widen out my stock's barrel channel I decided to take some COAL measurements of my new McGowen 6mm Rem. barrel. I only tried a few bullets but in those I tried it is obvious this barrel has a lot of free bore. Bullets are going to have somewhere in the neighborhood of 0.100" of jump to the lands. While I prefer to be around 0.020" - 0.030". I have a new Cooper in 7mm-08 rem. that has a fairly long throat and so far I can't get it to shoot worth a hoot.

Would be interested in hearing some experiences people have had with barrels chambered with this kind of free bore?