Is the maximum cartridge overall length of the 9.3x57 is 3.189"? Norma's website lists the COAL's of its various loads in 9.3x57 as from 2.933 to 3.012". I'm giving some thought to building a 9.3x57 sporter on an intermediate Mauser action with a magazine box length of 3.115". Looking for opinions: would this magazine box's slightly less than COAL dimension make this a poor idea, or is the 0.074" difference too inconsequential to matter?