You should be fine as long as it is sold to you as NIB with all original SA warranties in place. Dry firing should not be an issue since many gun shops do not like customers pulling the trigger or excessively racking the slides anyway. Good luck with your purchase and hope you enjoy the new XDm. Also, since Bass Pro Shops do not have ranges, as far as I know, there should not have been any rounds put through it except for the factory test and casing marking.
"The whole of the Bill (of Rights) is a declaration of the right of the people at large or considered as individuals.... It establishes some rights of the individual as unalienable and which consequently, no majority has a right to deprive them of." (Albert Gallatin of the New York Historical Society, October 7, 1789)
"A free people ought not only to be armed and disciplined, but they should have sufficient arms and ammunition to maintain a status of independence from any who might attempt to abuse them, which would include their own government." - George Washington