Indeed, although I do measure and log the OAL, I arrive at it by crimping properly into the cannelure or crimp groove and seeing what I have.The OAL listed in the manuals is useless to you when loading revolver ammo unless you use the same exact bullet, same exact brass and it's trimmed to the same exact length. You should be using the manufacturer's supplied crimp groove. That is the correct place to crimp that bullet. It's been a long time since I've measured the COAL on a revolver cartridge.