I assume you are talking about the far right bullet in the 9mm group here:
http://leeprecision.com/files/products/BulletMolds.jpg
If so, seating it to a "normal" OAL you find in a commercial/jacketd round of that weight should both cover the grease groove and function just fine.
But the only 125RN I see here has only one lube ring. Are we talking another bullet?