I use a 243 wssm in a browning a bolt v. stalker topped with a leupold 8.5 x 25 50 mm . i load it with a 60 gr. sierra varmiter bullet 50.0 gr h 414 also a 80 gr. berger bullet .with 48.0 gr. h 414 . my best group with the eighty has been five in. at 600 yds.
I would love to use an AR for coyotes, but I'm too late to legally have one in California, thanks to the misinformed legislators who passed the anti-gun laws covering such firearms as the AR-15 and related so-called "Assault Weapons," which by-the-way seems to be a term that I have yet to see defined.
god i love texas
i use whatever is handy at the time. we usually take out the ar and shotgun for up close shots. the only good yote is a dead one where we are, they kill too much livestock to let them run without throwing some lead at them.