I had a 7600 in 35 rem. rechambered to 358 win. a couple of years ago. The work was done by SSK industries,I think the cost was about 150.00 I ordered the rifle new from Grices just for this project. It has become my favorite deer rifle. I had several gunsmiths tell me it couldn't be done,something about the barrel lug. I know you are asking about the auto but I'm just saying don't give up if that's what you want, keep looking and asking around. You 'll be glad you did.