3-die or 4-die for new reloader

[tompt]

I've read several threads discussing the advantage of using seperate seating and crimping dies. I think I understand the issues, including OAL consistancy and bullet setback. I'm a new reloader and would like to ask for advice for my situation from more experienced reloaders.

I have a Dillon RL 550b on the way and have been given a Lee 3-die 9mm die set. It's not a perfect match, but can I use the 3-die set and leave the fourth station empty? If not, can I buy any brand of factory crimp die or do I need to buy a full 4-die set? Or should I instead be thinking of something like the RCBS Lock-Out die for the available station?

I appreciate any advice. I'll be loading 9mm with DP 124gr FMJ bullets and seeking a light range load to begin with. As a new reloader, I'm interested in making safe rounds that I can be proud of. Speed and efficiency can come later.

Thanks!

[GlockCanMan]

I use 4 dies. Crimping is the 4th stage and I use the Lee taper crimp die. I have tried to do both seating and crimping at once, but got a little better control over the reloading and accuracy if I did them seperately.

[Hi-Power Jack]

I reload 9mm on a Square Deal, and it has four dies

1. decap & resize

2. bell & powder

3. seat bullet

4. crimp

Not sure how skipping a die would work out??

[Gabe Athouse]

I would use your existing seating die in station 3. You should be able to adjust it to seat with no crimp, if its like RCBS die sets. Buy a dillon crimp die from BE to use in station 4. It will give you better finished product. I've been thru this myself with a 550. I wouldn't worry about a lockout die. Always double check everything is adjusted properly and hooked up. You should be good, go slow, minimize distractions ( no tv, phone), visually inspect each case after powder drop.

[Steve RA]

Agree with above, always use 4 dies.

[tompt]

Thanks for the advice guys. 4 dies it is.