As a part of my ongoing email exchange with Shoot Straight, here is the latest reply that I got from the store:
Please excuse our lack of clarity on the point you raised. Shoot Straight certainly respects the right to lawfully conceal a firearm. As long as the firearm remains concealed, and is not exposed, our staff will not seek it. However, if a staff member sees a firearm, then they may check it to make sure that it is unloaded. The meaning of our door sign that says “concealed means concealed”, is that store patrons that choose to conceal their firearms must keep them concealed at all times throughout their stay – even while on the range. It is against Shoot Straight policy for a customer to unholster their concealed firearm, or draw from concealment on our ranges. We hope this more detailed explanation clarifies any remaining questions. However, please do not hesitate to contact us again if there should be anything else that you might need.
My remaining question is this: If I enter the store with a lawful concealed weapon, and I want to shoot at the range, are they saying that I must unload it prior to entering the store? I am not sure how to take this.