I wear a shooting pad so as not to get bruised but yes shoulder definitely gets sore. I try to limit myself to about 4-5 boxes for ducks, 4-5 for perdiz (Quail), 10 for pigeons, and 20- 25 for dove shoots. This trip I shot a total of 86 boxes which is 2150 shells. In 6 days. Not high volume by Argentina standards but enough for a hell of a good time. Other hunts I've shot 1000 rounds a day on dove and that's pure torture. everything hurts afterwards.
I think you meant 10,000, right? Dang man, I think I'm already waaaay too old for that, lol. I've never seen so many birds. I've heard some crazy stories though. And they must have some good bird skinners, or wait...You can't bring them back, can you? How does that work, anyway?