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Revolver OAL is established by the cannelure/crimp groove location.
Published OAL does not mean much unless for exactly the same bullet.
Seat one to the middle or top 1/3 of the cannelure with the crimp shoulder in the seating die not making contact. Then back off the seating plug so it no longer touches that bullet and screw down the die body til it crimps. Look at a factory load for an eyeball estimate of a firm roll crimp. Then turn the seating plug down to touch that bullet. The next one should seat and crimp in one step. You might have to make some minor tweaks to get a good looking cartridge, but that will put you in the ball park.
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