Originally posted by toadkill for anyone that doesnt know, the 7mms and 13mms are the same bullets (with little manufacturing varience) as the .303s. and hte .50 cals. they just have different names, because the germans, italians, etc. used the metric system as opposed to the us/british standard system. 7mm=.303/.30 caliber13mm=.50 caliberjust thought i would inform the masses who dont want to search for the metric-standard conversions