I have a Borden Alpine single shot action with 4 barrels all chambered by Borden. A great guy to deal with and quality second to none. Jim Borden, in addition to being a well known gunsmith, is a mechanical engineer as well as a machinist. This depth enables a customer to get much more, in terms of technical acumen, than one would with many other gunsmiths. I started out incrementally improving Remington actions, taking note of what it cost to get a Remington action up to exacting standards conducive to accuracy. When all of these costs are added up, one will find that a custom action is pretty close to what one put into a Remington action. There is nothing wrong with going the Remington accurizing path as it enables one to progress while incrementally spending money as opposed to a single outlay. A custom action comes with all of the enhancements and accuracy with no need to do anymore except to chamber and fit a barrel. The other nice aspect of working with Borden and others is to request they keep on file all of your dimensions for future barrels. This way one can send a barrel and have it chambered and fitted precisely without having to send the receiver.