Raylan and Boyd manage to catch up to Ava at the same time, because it is TV. They shoot it out, Raylan downs Boyd. Raylan lets Ava go with a couple mill, uses the rest to prove his 'innocence' and says "well marcum had less than we thought", and he retires from the Marshalls, moves to miami with the wife, everyone lives happily ever after.
Also, how bout the Wynn Duffy escapes death scene? DAMN. Sad this show is ending