So that is 0.10" thicker than the .177-.25 cal. mags.... I assume you mean the 44.8 gr. JSB sits 0.086" below the back edge?.... Anyway, 0.450" long is no problem in .30 cal....I assume the .35 cal is at least as large, be nice to know for sure if it's larger.... Thanks for that.... I am looking to see if there is enough room for a .35 cal pellet 0.536" long....Bob