On another tangent-With Weatherby's and free bore it's near impossible to reach the lands. Still I played a lot with seating depth to the extreme that I placed each round in the chamber with only about 0.1" of neck holding the slug. Running them through the magazine and action would have induced runout. Groups tightened up when I had things shoved in to about the caliber distance. Pretty much using all of the neck to grasp ones slug. My suspicion is that a good consistent grip by the neck helped stabilize ignition pressures and thereby accuracy.
Without free bore, I'm nudged up pretty close, but I don't use light for caliber slugs.
Last edited by 1minute; 08/05/16.
