clearly remember the first time I brought an AR-15 on a hunting trip. I was hunting coyotes in Texas with the legendary Gerald Stewart, then owner of Johnny Stewart Game calls. As a guest I had to pretend to be good natured and endure all the Rambo references and the not-funny “jokes” about my choice of rifles. By week’s end it was a struggle. Today, AR rifles are common in hunting camps around the country. The AR-15 has some excellent big game cartridges such as the .450 Bushmaster, .458 Socom and .50 Beowulf. The trouble with these cartridges is they are not suitable for extended ranges—the rounds are powerful, but they're pushing big, heavy bullets that run out of gas at around 150 yards and experience significant drop. With a few exceptions (the .30 RAR comes to mind,) the AR-15 cartridges with trajectories flat enough for long range shooting lack the power for ethical big game hunting.