Cartridge Length Rim diameter / body diameter
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44 magnum 1.285 0.514/0.457
45 win mag 1.198 0.476/0.476
44 special 1.160 0.514/0.457
44 colt 1.100 0.483/0.457
44 russian 0.970 0.515/0.457
45 acp 0.898 0.476/0.476
So the question is, do you want to shear off a rim, or draw down the whole body diameter? I made up some 458's this morning from 44 special brass. Was using Walnut Hill press and 458 jacket maker set. Shearing off the rim was no joke. Had to adjust the punch about five times to finish the operation but then the rest of the body is perfect diameter for 458. Still requires drawing down to 0.455" but it was a breeze compared to the rim shearing. I have also used 45 Win Mag brass. There, one starts with a smaller diameter (0.473) but has to draw down the whole casing to that diameter. Both are about equal work. When shearing the rims, I ended up with a stack of thin brass rings at the base of the punch.
Enter the 44 Colt. Perfect body diameter (0.457) but a smaller rim diameter of 0.483" !!!
Going to order some from Starline to see how they do. Will definitely be easier than 44 Special. Grafs has it in stock and with FFL discount they're about twenty cents each. Off-topic, it slays me how much people ask for unknown condition fired brass that they think is rare, when Starline regular stocks it. Saw a lot of lowlifes trying that especially during Obama...
Here is a 450 grain that fills lead right to the tip of the 44 Special, with a tiny bit protruding. The overall length of the bullet is 1.192"