That's the way I think it should be ! Anyone that doesn't know that a 30 cal. could be many different cartridges shouldn't be messing with guns! And there are many different calibers. For instance the following are all 30 calibers but are meant to be used in DIFFERENT chambered guns ! 30-30 WIN., 300 win. mag., 308 Win., 308 Norma mag., 30-06, 300 ultra mag., 300 H&H mag , 378-30 plus many more all being 30 cal., all to be used in "different" rifles ! If a shooter using any of these rifles was to be asked what caliber he was using, the correct answer for any of them would be a 30 caliber ! Then he should go on to state the chambering for the rifle.