1. Choke changes would be the place to go to alter patterns(I'm assuming they do not use reloads)
2. The only way to reduce recoil, true, felt or wished for is to alter one or more of the factors that determine recoil(payload, velocity and gun weight.
Nothing you can do to the inside of the barrel will reduce recoil unless it reduces velocity. You might as well urinate through the tube.

> Jim Legg <