So basically, when you say the cartridge was developed for a 3" barrel you mean Federal's factory ammo's powder charge was optimized for the 3" barrel? I can dink around with handloads for any particular gun chambered in a particular cartridge and say I've developed the cartridge for a particular barrel length? Wow! That somehow makes me feel very powerful.
My 327 cartridges were developed for a 2" barrel.
