I understand why I would need two of the #3 seating/crimp die on a turret or progressive press - one would be set to "seat", and the second one would be set to "crimp".
Wouldn't it be the same for the single stage press, or do you mean you would use the one die for seating, and later use the same die again, but reset for crimping?
I'm mostly all set - just need to get the reloading supplies.
MM,
For single stage, I load in "batches" of 50 to 100 or more cartridges.
With the older RCBS 3 die set I have like yours, I size all my brass with the first die (#1, size die) for the batch (Actually, I resize and inspect all my cleaned brass in one session, reload in another).
You will need to use a little sizing lube, these are steel dies and you will not get away without lubricant like you can with carbide dies.
Some reloaders lube every 4th or 5th case, I just put the brass in a gallon zip-lock bag with a light shot or 2 of one shot sizing lube and play shake-n-bake
A little goes a long way, do not use wax based lube or you will get stuck cases!
Then I decap/expand the amount of cases I will be reloading with #2 die.
With plated or jacketed bullets, only bell enough so you can balance the bullet on the case mouth as you raise the ram to seat.
With lead bullets, you will need to bell slightly more, enough so you don't shave the bullet as you seat it.
Next, seat the primers in the cases, either using a hand primer or a primer arm on your press.
I personally like hand priming, but others like priming on the press.
I then charge each case, then place it in a case tray.
I then seat my bullets with #3 die in all cases for the batch.
Last, I re-adjust #3 die to crimp the case the proper amount, crimping all bullet/cases.
Over-crimping plated bullets can damage the plating and lead bullet underneath.
For 38spl target or mid loads, I have found a light to medium crimp is all that is necessary.
As you gain more experience, you will be very able to judge amount of crimp needed.
I hope this was not to basic an example, not sure of your reloading experience.
Happy reloading!
JD