From the website I quote: "We welcome .22 through .45 caliber pistol ammunition. We also allow 22 rimfire rifles. The minimum age requirement for a 22 rimfire rifle is 14 with parental supervision" http://www.billjacksons.com/departments/gun-shop/gun-range-information-and-rates/
They don't allow magnum loads.
I believe ots a 44 Magnum
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