Lamar - No, it is not made to shoot 45 acp. 45 acp is a 'rimless' cartridge and will not function in the Judge. There re some who have procured and used 'moon clips' to fire 45 acp from a Judge (at least a "raging judge") but it requires machining of the cylinder to fit the moon clips. Much safer and better in the long run to just buy a pistol that shoots 45 acp.

Lamar, no Sir. Without properly fitted moon clips, the rimless 45acp cartridges would slide into the cylinder. google.com/search?q=45+acp+vs+45+lc&tbm=isch&source=iu&ictx=1&fir=16-4SpiokFtmFM%253A%252CPwNNbSRuBptRmM%252C_&vet=1&usg=AI4_-kQZ17WJB_IGaMR6mmHHL9ZST4Kzfw&sa=X&ved=2ahUKEwiptLzu6JvhAhUtheAKHTvyBtAQ9QEwAHoECA4QBg#imgrc=BleWCoOaicCbBM:&vet=1