In my recollection the factory has wisely not taken an official position on any ammo except no +P. Other than that restriction it is up to the owner as to what suits him and his R9 best. Several owners have had anecdotal conversations about ammo with Karl and Maria but it was their opinion and preference at the time to be helpful and offer suggestions. Use whatever works for you. My distributor, Tom Watson, now deceased, steered me to the Gold Dots from day one and I evolved into the GD 124 gr. and HST 124 gr. as an alternative carry ammo. It is doubtful that you will ever hear a specific ammo recommendation from Rohrbaugh.