Starting with a new Etronix, I did a series of controlled accuracy tests with a variety of factory ammo and handloads. Half of each batch of ammo was saved for later testing. The rifle was then sent to Shilen Rifle Barrels, the famous makers of ultra-accurate, tournament-winning barrels, and the original Remington barrel was replaced with a top-of-the-line Shilen. The only stipulation I made was that the Shilen barrel be of the same length and diameter as the original so there would be no weight difference. Upon return of the Shilen-equipped Etronix, accuracy testing was repeated, firing the same batches of ammo used in the initial phase of the test series. From the first five-shot groups on, the improvement was little short of astonishing, with the accuracy potential of the Etronix being revealed at last. During test shooting of the rebarreled rifle by Remington personnel, one shooter exclaimed after his first five shots that it was the smallest group he had ever fired in many years of shooting. Another was so amazed at the performance that he suggested I might have somehow loaded the test ammo with "magic" bullets.