The wound channel calculator is broken,thats why you get the same result with those different velocities. Maybe we could get it fixed Marshall? I'm can't wait to figure the permanent wound channel for my new .385 Meplat 45-70 bullets.
A forum community dedicated to Sport shooters, owners and enthusiasts. Come join the discussion about optics, hand casting bullets, hunting, gunsmithing, styles, reviews, accessories, classifieds, and more!