If you really do have the Model of 1889, you better not shoot the newer, highpowered ammo out of it. Your locking lugs won't take it. Also, you better research the variants, to see if your rifle takes the old-fashioned low pressure ammo (190 gr. silercolored FMJ RN going about 2,000 fps) or the newer, HOTTER stuff.
How do I know...(insert eeeevil laugh)....
Edited to say: I only like overpriced Norma casings.