Cartridge OAL and base to shoulder are not the same. OAL is important because you don't want the mouth of the cartridge to jam in the throat of the chamber. This can cause a pinched bullet and possible chamber rupture upon firing. Base to shoulder dimension is important for chamber fit, and brass life/growth, and a too loose fit will cause misfires. You DON'T want to stretch your brass a whole lot every time you cycle it, it'll soon split. I recommend you buy the gages and learn to set up your dies properly for good fit, function, and case life. Sorry, but anything else is just a waste of your time and money, IMOP.
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