i never did these two steps together, so its new. I have a set of RCBS carbide 9mm dies. I set the crimp as i was told from the Speer loading manual #14. then I screwed the seating plug down till it touched the bullet. It then say seat & crimp a bullet to check and i might have to do minor changes. Well I did and it seats and crimps in one pull of the handle. The bullet came out with a flat spot on top. is that ok or will it mess with the balistics? here are the bullets. The one on the left is the 2 steps in one bullet and the one on the right is seated and crimped seperatly. You can clearly see the differance in the two. will that flat spot affect the accuracy? when i losen up the seated to apply less pressure the oal is longer and not what i want 1.135" these are berrys bullets they are 124 gr. first time I used them.