i've owned my Mark V deluxe in .300 for 15 years and i've shot everything from antelope to elk with it. i had a intergrel muzzlebrake installed on it and a mercury recoil tube installed in it when i first bought it and it's like shooting a .243. i know it must have been a fluke, but i shot an elk on the run at about 150 yards right through the temple. cleanest shot i've ever made in my life. had to lead the beastie just slightly. it dropped/folded instantaneously. when i went up on it i couldn't find any hole or wound and thought maybe i scared it to death. it wasn't until i started to skin it i found the clean, right through the temple, hole. i know one thing for sure about the gun, and that is, it shoots right where you want it. it took me a couple of years to get used to the extent of it's range. i just never felt comfortable shooting out that far. i still won't attempt anything over 500 yards, just because i don't want to chance it and i figure if i'm that far away i should be able to get closer before i'm going to spook whatever it is. i don't reload, so my only experience is with factory ammo, but i get the most accuracy with 180 gr. bullets. the last time i checked the M.O.A. was about 2 years ago at 200 yards and i was getting 1.25. i've always sighted in at 200 yards and it works best for me. i'm about 4" low at 500 yards flat. i can shoot right on the money pretty much out to 350 across- down canyon or up. have never used a range finder out in the field. pretty much guess and go by what other guys have checked on their range finders. my eyeball has been pretty close.