I have a 7mm mag A-bolt with the Boss system and I can say that with 160 grain load that I can shoot with whole in whole accuracy at 100 yrds and the recoil is light. When I changed to a 175 grain bear claw and changed nothing my group went to 3". ..not good. after adjusting the Boss by thier chart I was able to get to a 3/4" group. so from my experience it works well. Thats not to say the you can't get that accuracy without the system, but very little recoil is also nice. they are loud though.
When calling coyotes, more often than not they will circle on a target they are
coming into and approach from the downwind side. Presumably they do this in
order to align what they smell, with what they are hearing.
This means that you should always have your downwind side camouflaged and have
an open shooting lane. If the area is heavily covered the coyote could come in
take a look and be gone, with you none the wiser.