Well joining the club itself would be difficult we have a membership cap and waiting list right now however anyone can come to the shoots, they are open to the public. I am pretty sure it only costs $5 to $10 to shoot in the competition. The web page for the club is Waterloo Rifle & Pistol Club
There is no information about the military shoot on there because we have only ever had 2 shoots however I have a meeting coming up soon in which I will find out when the next one is for you. The Mosin I picked up is a Tula 1926 Hex receiver, and puts 5 shots at a 1/2" group at 100yards, I am very impressed with it.