.22 Hornet is about ideal, and .22 RF mag is very close 2nd best, but I have shot beavers with everything from .22LR ( inadequate for anything but a perfect head shot ) to .308. A varmint bullet is safer than a big game bullet because they will likely open up and fragment even when hitting water. A ricochet from a big game bullet might go 4KM and is too dangerous even in sparsely populated country in my opinion. I believe that the 22-250 that you do not want to use is a better choice than a 30-30.
Accuracy is very important, since a beavers head is very small and only half of it is above water when they are swimming. I want a beaver rifle to group less than 1.5" at 100 yds, I think that would leave out most SKS and similar surplus rifles.
i would use whatever you already have, .22 if you want the pelts, i shot one with 7.62x54r and it blew its head right off, the rest of it looked pretty intact though haha
Like the earlier poster. Beavers HATE the sound of running water. You pull the damn apart a bit, and we just stand on the damn dam after and shoot them with OO buck as they swim toward the noise. We've shot 13 on one damn in the space of 10 minutes. OO buck is good as the earlier posted said you don't have to aim perfect every time.
Beavers are just large rats of the water really. As a national symbol it's actually embarrassing once you know beavers.....
I was talking with 1 guy who told me his buddy would hunt beavers with a 45/70 he would aim in front of them and let the shock wave in the water kill them.. Not sure if it works though..



























