We had a similar discussion yesterday at the 5-stand course where such things are put to practical use. My pal with the K-80 was shoointg chokes marked skeet and I/C. He claims the pattern board with his 7/8oz 12ga loads show they print THAT LOAD closer to modified and full. This combo essentially removes what would have been a 'finge' had he been shooting a standard load.
On the other hand, I use chokes made and marked by Briley as cylinder in my Invector Plus choked Cynergy. I also use a 1 oz load with hard shot. It prints a strong I/C in spite of the choke markings. Reason? Long cones, overbore barrel, some effective choke anyway due to the jug effect of the screw in system, modern shotcup wad and very hard shot. I like to have some fringe area on S/C targets, as I tend to be a crummy shooter on a regular basis and this gets me a better score. This is not skeet or trap where the distance can be closely approximated.
We also shot some 19 yard wobble trap. Everybody had a I/M choke or a full choke. Hardly obsolete on those targets.
If you do not have a near 70% pattern at the plane of the target, there will be statistical misses Digweed or no Digweed. This was measured and quantified years ago. Effecting a kill with a shotgun is a sometimes thing and the only way, and I mean the ONLY way to shoot perfect scores consistently is to have equipment that eliminates the chance variable. This still requires choke, at least with lead shot.
