We have used a .243, 7-08, .270, and .300 Savage to kill a good number of them without drama. We shoot them on site like Feral pigs. Like Feral pigs once you have them it is damn near impossible to get rid of them. I digress. Anyway if I was paying for a hunt I would prefer something 6.5mm or larger.
As far as eating the young ewes are not bad. On the rams the only way I personally think they are edible is ground and made into sausage. I do clean them and run the meat through my grinder and if I don't make sausage it gets fed to my dogs. They like it fine.
