40 yard patteren

[Boydawg]

On a 40 yard patteren, 10" circle, is there a optimum percentage of shot to shoot for in the 10"  & 20"?   Say 60% in the 10, 30% in 20 and the rest outside the 20.  Anyone ever figure 5,10,15 and 20 inches at 40 yards?

[SP-10 Fan]

In the still Shoot contests they are sitting on a bargain basement turkey 'chair'.  The target, a 3" red circle is 40 yards away.  They have to shoot the ammo the match personnel provide.  I've seen scores in the 50's of hits in the 3' circle.  Other than that and the 10" circle I haven't seen where some one slowly widened the circle counting the shots included in the ever widening target.

[gobblergls]

For turkey hunting, most strive for a minimum of 100 pellets in the 10" circle (78 square inches more or less) at 40 regardless of shot size.  From 10" to 20", the ring has 3 times the surface area of the 10".  It would be a rare pattern (none I know of)  that has 100 in the 10" ring with 300 in the 10" ring.  That would be a great hunting pattern for 40 yards for my purposes with built in forgiveness and not too heavy a load.  In order to get 250 or so in the 10-20", the load will most likely put 250 in the 10' ring as well.  For hunting, I wouldn't want a pattern of 300 in the 10" with 150 in the 10-20" ring.  I limit the above to 40 yard patterns.  For my purposes, percentages aren't as important as sufficient reliable killing pattern density in the 10" and 10-20" rings.