I have been reading and trying to decide what the average cartridge/gun is on this post, but I am seeing alot of different calibers. I want a long range hunting rifle, but have a limited budget(build most myself) and I am looking for the best all around cartirdge. The rifle will take all of my money I have saved, so I want the most efficent bullet for 1000yd elk shots. Elk is the biggest animal i will take with the gun. Mostly I would like to practice shooting at Pairie Dogs to get to know the gun before I take it Elk hunting. That is one of the reasons I want to have it inexpense to shoot, due to shooting Pairie Doging and getting used to my gun. I know that "The Best Of The West" hunting show use many different type, 6.5-284, 7 STW, 300 WSM, 300 Rem Mag. What is your opinions of cal for me? My thoughts for myslef are(no order): 6mm AI(Not much of a Elk Gun) 6.5 - 284 7mm Rem Mag 30-06 AI 300 Rem Mag 300 WSM 300 RSUM Bullets looking at are the: 107 gr(6mm) 150 gr(7mm, .308) 168 gr(7mm, .308) 175 gr(7mm) 180 gr(.308) 200 gr(.308) 220 gr(.308) With those I look at the BC, Velocity, Energy and of course Trajectory of the bullet. The parts I will use for the gun: Rem 700 long action shilen match grade barrel Boyds stock Burris Scope Thanks.