RE: Browning A-Bolt 300 WSM Overall Length?
Just about all magnums, 300win mag, 338 win mag, RUM's, whatever, have alot of freebore unless you have a custom chamber. And I know people that has had custom chambers and you can throw the reloading books out the window, cause you are not going to be able to reach. Most if not all factory WSM ammo doesnt' exceed 2.86".
Reaching the rifling can be way overrated. I have found alot of other factors can be much more important like brass quality, bullet runout, case neck thickness.