You would lose a good deal of case capacity by trying to make a centerfire equivalent to an existing rimfire case. You see, a good deal of the back portion of a centerfire case is not hollow and does not contain any powder. This area is is necessary to contain the primer. Rimfire cases, on the other hand, typically lack this solid area and are hollow all the way back to the base of the case.
Smith, and Wesson, and Me. -H. Callahan
Well waddaya know, one buwwet weft! -E. Fudd
All bad precedents begin as justifiable measures. -J. Caesar