RangerRiz, I've been thinking for some time now on the wildcat your interested in. There are a number of rebore specialist out there. Contact them as to what you want as a lot will have a price to rebore a barrel that is sent. If you need them to take it off you'll incur an up charge. But...expect to pay in the range of 250.00 or so. What I planned to do, IF, the rebore specialist didn't have a reamer for the 35-30/30 IMP was to 1st have a gunsmith rechamber it to a 30/30 IMP, the barrel will then be off and it can be sent to have rebored. All that would be needed then would be to have the neck reamed by your smith who will be reinstalling the barrel. This is going to be my approach as I will be using it as a 30/30 Imp. for a while as I want to see what the improvment over the 30/30 actually is. Then have it rebored to the 35 cal. Understand that there is usually an upcharge to work on levers as opposed to bolt actions. At least this has been my experience. Not much but something. I've had 3 rifles rebored to different calibers and one about to be sent out (waiting till after the Christmas rush) and couldn't have been more pleased with the outcome. I have an old Mossberg Model 679 That is going to be the the rifle of choice, probably go with a 1:16 twist. Good luck with the project. CRASH87