I have been wondering this for a while. If someone wanted a round that does not exist commercially or possibly privately (lets just use something like a 17-06. (30-06 necked fown to fit a .17 HMR bullet) as an example) Could they just put a cartridge through a die to make it fit the right size bullet? How would they go about either having a rifle made for them, or making it themselves? Could they just get a heavy barrel for a .17 HMR and have it milled so that a 30-06 cartridge would work with it and so it could be attached to the reciever? Could they just use a reciever designed to use a 30-06? This is something I have just been curious about. Wildcat round have always interested me so I just want to know how it is done. Bonus Question. Since I used a 17-06 as an example, I would like to know how well ya'll think it would work for either super long range varmit hunting or target shooting. Wouldn't this round cause the barrel to wear out faster?