i have finally gotten around to reloading for my .404 Jeffery. My rifle came with some loaded rounds using Woodleigh 400gr RNSN. They were crimped at the top of the cannelure and measured 89.70mm base to tip of projectile. I loaded mine to crimp at the top of the cannelure , but the measured closer to 89.80mm. When I ran them through the magazine the second one down had jammed. Going back through the data that came with the rifle the length should be 89.20mm. Reseating the projectiles to length now has them feeding flawlessly. Only problem is it looks like the cannelure is too deep to be able to crimp. Gives me an excuse to load a magazine full and see if the projectiles get pushed in on the last couple.