Cooper makes a ton of guns in familiar calibers... Although I do agree with you that they make a ton of "weird" wildcats... Ussually for benchrest, target, etc.

They make guns in .25-06, .223, .22-250, etc. They don't make any bigger than .25-06 though... Also the one I was interested in (the varminter) was only available in single shot... Great gun though.