Re: Long Range Shotgun for Coyotes
Since you're shooting a 3.5" chamber, I'd definately recommend that phone call to Carlson's. Most of the 3.5" chamberings are backbored...meaning, there's more room in and just past the chamber section of the barrel. This translates into better patterning, provided the choke/shot combinations are appropriate.
The .705" restriction has shown improvement, in both pellet count and uniform patterning. Again, most 3.5" chambered 12 gauge shotguns have a bore size that is slightly larger than the .728" of a standard 12 gauge bore. Having a larger bore allows for less restriction to get tighter patterns.
This may not be true of Browning shotguns, as it is with Mossberg's 835 Ulti-Mag.
Since the .705" is doing good, a .710" might be better. Experience speaks volumes with this sort of thing and Shane Carlson is the man.
Just the same, if you're happy with the way everything is performing as it is, then there may be no need to search any further.
If God didn't want man to eat animals, he wouldn't have made them out of meat.