I have a 25-5 , 4" . I got it from a friend , @ wholesale rate . I measured the throats and they were oversize . I started shooting cast bullets measuring .454 right from the start . It shoots very very accurately using the real " Keith " 255gr swc , ( H&G 501 ) and it doesn't lead the barrel .
So , from my experience I have to say that the oversize throat thing is really over blown . Given the opportunity , I would gladly buy another one if available at the same price as the last one I bought .