The NMLRA has a record book, that it came out with about 10-15 years ago, The Longhunter Society if I remamber correctly, I ordered the first one that came out, before most of the records were tainted by inlines...
The largest grizzly in the first edition was killed with a .54 and a round ball, over 120grs FF....Range was 100 yards, hit behind the shoulder the bear ran about 50 yards and piled up....The ball was found under the hide on the off side...