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The range/store I frequent (Bullet Trap in Plano) says if you are going to carry concealed, it stays concealed in the store. If you are going to shoot your carry weapon, then you draw it ONLY when you get to the line on the range. You lay it out on the table and shoot like any other gun you are using. You do not put it back on your person until you have finished and then you do it at the line and cover it back up.

I would suggest you ask the store what their policy is. Unfortunately, if they tell you they don't want you to carry concealed in the store, then you have just been given verbal notice and you will not be able to carry. If you don't ask, then unless they are 30.06 posted, you would be legal until verbally advised otherwise.