They have a rifle range there you should be able to sight your gun in... Call up there and ask for Tom if you have any other questions he's one of the owners I would say 97% yes they do prefer you shoot their ammunition rather than bring your own in
Give them a call. Always ready, willing and able to answer your question(s).
You should be able to use a 7mm mag as long as the ammo is not steel.
I am pretty sure you can. The only restrictions I believe are with the ammo you use
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