I have had one of these for 2 years now,and at 200 yards with my reloads, it will shoot one inch groups all day. Does anyone else have this rifle, and how do you like it? In the Sierra reloading manual under 7 mag, it says the U.S. Secret Service Counter sniper team uses, custom Remington 7mm mags. How much diffrence do you think there is between the stock Sendero and theirs?