I can see your point, sj, but, if it is valid how did he break every one of the birds approaching the 130 yd. distance with no more than two tries, then broke the 130 yd. bird on the first try. If your 10% idea is right, George is one very lucky man.
I think the 10% figure must be off by a lot. SRH
130 yards is the length of a football field + both end zones + an additional 10 yds.
Hang a clay pigeon up & carefully measure off 130 yds. Take a full choke 12ga using 1Ľ oz #5s & fire away. Report back what percentage you break. Hang it in the center of something about 6 feet square which will show hits. tell us how many hits are in that 36 SqFt area "After" you figure out how high to hold to center on it. This would make for some very interesting statistics I think.