I don't have one handy, but by comparing the pictures in Speer's manual of it and the 180 and a 180 on hand, I get about .445" from the cannelure centre to the base. The 180's cannelure is about .040 - .045" wide.
Contender, I pulled a couple Speer 220's out to measure. Given a little slop for tired eyes, they measure .448 from the base to the bottom of the cannelure. Overall length measures at 1.023 and the cannelure is about .040 wide. Hope this helps. Ed
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!