I am getting very close to buying a Bushmaster Varminter and I want to make sure I get the best scope I can afford.

I plan on shooting coyotes out to 300 meters.

Anyone have any suggestions?

The Bushnell Elite 4200 is the best scope under $500.  The 4-16x50 would serve you well.

Other good options would be the Nikon Monarch, Weaver Grand Slam or Leupold Vari-XIII.  I have heard that some Burris scopes are nice, but I have no experience with them.

Weaver Grand Slam........awesome hunting scope.  Glass is better than VariXIII in my opinion.

YMMV.......but probably not.....[:D]

Anyone have any suggestions where to but for the cheapest online?

I have had a Tasco 16X42mm on my Bushy Var. since 2001.   Rear A.O., turrets, 30mm.
Absolutely  no complains.   $299. most anywhere.  Originally made for the Navy Seal team.  If there was one neg. it's not a variable.  I have heard the side A.O. has had problems on some.

[url]www.swfa.com[/url] has good prices.

I just bought a Nikon Monarch UCC 4-12x40.  Side by side with a Leupold VX-III, the Nikon glass seemed much better.  I paid $379 at Galyan's.  I know some people have their problems with Galyan's/Bass Pro because they don't sell ARs, but I wanted to go look at some scopes.  If I'm going to take their time, I'll usually buy from them.

Having said that, an on-line search turned up the same scope for $379 plus shipping at lots of places.  You might save a little on-line without having to pay tax.

FWIW, this scope is going on a RRA Varminter upper I've got on order.  Distance and use is almost identical to your requirements.  I think the Nikon will serve the purpose quite well.

You may also want to look at the Cabela's Alaskan scopes.  I here they are VERY nice for the money.  I just have a problem buying a scope without actually seeing one for myself.