This is my favorite Mosin-Nagant website:
http://7.62x54r.net/
I have a 1942 Izzy 91/30 and a 1948 Izzy M44. The 91/30 is one of my favorite rifles to shoot. As pointed out, ammo is cheap. A slip-on recoil pad is also very good to have in the range bag!
TK