Funny you ask. I just finished up reloading several hundred rounds of .40 S&W yesterday using the Lee 4 die set. The factory crimping die has a few advantages over using the seating die to set the crimp. The main advantage is that the factory crimp die has a carbide ring in the base that resizes you finial round as it crimps. I also find it easier to set the amount of crimp, whether heavy or light, using it over the seating die.
When coupled with the Lee bulge buster it will eliminate the lower case bulge that sometimes happens with pistols that don't fully support the chamber. It's not recommended to use it if you shoot one of those but if you don't then it's really a nice step to guarantee proper feeding in your pistol. All in all it's well worth the few extra bucks to get the four die set but you can pick up anybodies 3 die set and add the factory crimp die later if you decide to use it. I liked it enough that I picked one up for all the pistol calibers I reload for.
I am going to reload for my Glock 22. Is that a gun I should not be using the crimp die for?
I reload for my G19, with a four die set. FYI you must use copper plated, jacketed, or washed bullets when shooting a glock. If you hand load lead you will get some pretty ugly fouling in your barrel. We buy Barry's Copper Washed, about $40/500 at the 1500.
Get the 4 die set. Especially if you load on a 4 hole turret press. The Factory Crimp Die is WELL worth the extra step for reliable feeding.
I am going to reload for my Glock 22. Is that a gun I should not be using the crimp die for?
Is this really an issue? I dont shoot Glocks, so I have never experianced this.
You need a special die to "debulge" Glocked brass?
I have used glocked brass before and have never run into an issue using the normal sizing die,....
Whats up with that?
To answer your questions, yes you need a special die to de-bulge brass that shows signs of lower case bulge from firing in a gun that doesn't fully support the cartridge, 9mm the exception, I don't know of anyone that makes a die for bulge busting 9mm.
Is it an issue, not really I guess. It's one of those "anal retentive" things. The pistols I shoot have fully supported chambers so to ensure as close as I can getting to 100 % proper feeding I do it. If there's a failure to feed I'm pretty sure it's not because the case is out of spec. It's just a step that makes sure your round is the proper diameter from top to bottom. You only need to do it once if you shoot the same brass in the same pistol and not at all if you shoot a pistol that doesn't fully support the brass.
It's one of those reloader's choice kind of thing. I do because I feel it gives me a better round.