Hi Gary, I looked into the issue and the sign actually reads "no Centerfire rifles on pistol range". The sign is an artifact from the time when we did not have a sand backstop and rifle shooting was limited to the center bay. The rule is now inapplicable, since we no longer have a designated pistol only bay. However for the sake of clarity I had staff cover up that rule. Thank you for your feedback.
Not really sure why that would be a rule, I shoot 9mm parabellum which is a center fire round. I think the concern is the energy of rifle rounds damaging the range. .22LR is fine though.
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