i use at least a 223...some places i have to use a 22 mag but 50 yards is the limit ive lost 1 out of 3 at night with the mag,but like i said its in town and thats all the bigger i can use.
i dont like a 17 for the other reason during bad weather nights,the wind will throw a lighter bullet off more.
but i have seen yotes shot at night with 17hmrs.
shot placement being the key.