Lee .40 FCD and .40 Resize Die [Archive] - Glock Talk

PDA

View Full Version : Lee .40 FCD and .40 Resize Die


dkf
12-16-2011, 20:14
I'm setting up to load .357sig and I figured I would use a .40 sizing die to size the whole case and then bump the neck back with the .357sig die.

Just the Lee .40 carbide resizing die is $27. I can buy a 3 pc .40 carbide set for $27. I can get the 4pc .40 carbide set with the FCD for $33.

So what I was thinking of doing to save a few bucks is to buy the 4pc .40 die set (because I want to load .40 also) and use the .40 FCD to full length size my .357sig brass.(with the crimping stuff removed) Any issues with that? I have the tooling at my disposable to machine the FCD if needed.

Is the ID of the carbide ring on the .40 FCD the same ID as the .40 resizing die?

Colorado4Wheel
12-16-2011, 20:26
FCD does not sizes nearly as good as the Lee sizer. It's about .007" worse/larger.

fredj338
12-16-2011, 20:43
As Steve notes, the LFCD is not meant as a sizing die, so I would use the 40 carbide or for the serious 357sig handloader, get the Dillon dies. Spendy, but just about perfect.

dkf
12-16-2011, 20:43
Well I guess that takes care of that.

Maybe I'll just hold off on the the .40 dies for now and just use the .357sig dies.

sig357fan
12-16-2011, 20:53
I just went through something similar when I posted about using the 40 S&W FCD as a pass through sizer for 357 Sig brass, something along the lines of the Lee “Bulge Buster”, which is where I got the idea.

http://glocktalk.com/forums/showthread.php?t=1376790

In the post C4W informed me that the FCDs carbide ring was larger than the sizing dies carbide ring, I found this to be true when I finally got a 40 S&W FCD.

My FCDs carbide ring measured at 0.423” I.D. where as my 40 S&W sizing die carbide ring measured at 0.418” I.D., a difference of 0.005”, so the steel 357 Sig sizing die still might be sizing quite a bit of the 357 Sig body.

I’ve ran a few Sig brass through the 40 S&W FCD and am getting body dia. Right at 0.424” which is the correct dia. According to Lee’s “Modern Reloading” but that’s as far as I’ve gotten.

sig357fan

Colorado4Wheel
12-16-2011, 21:11
I’ve ran a few Sig brass through the 40 S&W FCD and am getting body dia. Right at 0.424” which is the correct dia. According to Lee’s “Modern Reloading” but that’s as far as I’ve gotten.

sig357fan

IIRC .424 is the MAX size for .40. You want your sizer to size smaller then Max Size for proper bullet tension.

sig357fan
12-16-2011, 21:31
0.424" is the size of the body of the 357 Sig.

drawings I've seen of the 40 S&W show a slight taper to 0.423" at the mouth so the FCD won't work for sizing 40 S&W brass.

but then we're talking about sizing the body of 357 Sig brass.

sig357fan

Colorado4Wheel
12-16-2011, 21:55
0.424" is the size of the body of the 357 Sig.

drawings I've seen of the 40 S&W show a slight taper to 0.423" at the mouth so the FCD won't work for sizing 40 S&W brass.

but then we're talking about sizing the body of 357 Sig brass.

sig357fan

.424 is the Max size for a loaded cartridge. Not the desired size for a sized case.

dkf
12-16-2011, 21:55
My factory .357sig rounds are well under .424" and have a taper also. They are .419" at the neck and taper to .420" - .422" at the base. My .357sig Glock barrels are supported much better at the feed ramp than my .40 Glock barrels so the .357sig cases don't get "bulged" like the .40 do.

sig357fan
12-16-2011, 22:33
.424 is the Max size for a loaded cartridge. Not the desired size for a sized case.

so whats the desired size for a sized case?

sig357fan

Colorado4Wheel
12-17-2011, 07:41
so whats the desired size for a sized case?

sig357fan

Nothing is set in stone as far as that is concerned, but inside Diameter "about" .003" below the bullet size. The idea is to get the case small enough to create enough bullet tension to prevent setback. Lead bullets are a little more finicky because if the case is too small it will swage the lead bullet smaller.

sig357fan
12-17-2011, 11:22
Nothing is set in stone as far as that is concerned, but inside Diameter "about" .003" below the bullet size. The idea is to get the case small enough to create enough bullet tension to prevent setback. Lead bullets are a little more finicky because if the case is too small it will swage the lead bullet smaller.

O.K., your talking about the case mouth being 0.003” under bullet dia. to provide proper bullet tension, and I see that if a 40 S&W case is at max dia. (0.424”) at the case mouth you wouldn’t have proper bullet tension, but that’s true with every cartridge I’m aware of, case mouth slightly smaller than bullet dia. to get proper bullet tension.

I was referring to the body dia. of the Sig brass between the shoulder and the extractor groove being 0.424” which is max for that part of the brass and that’s what I’m getting on the few pieces of Sig brass I’ve ran through the 40 S&W FCD. All my other Sig brass has been sized with the 40 S&W carbide and 357 Sig steel sizing dies so I’ve not got many fired brass to experiment with just yet.

sig357fan

Colorado4Wheel
12-19-2011, 10:15
O.K., your talking about the case mouth being 0.003” under bullet dia. to provide proper bullet tension, and I see that if a 40 S&W case is at max dia. (0.424”) at the case mouth you wouldn’t have proper bullet tension, but that’s true with every cartridge I’m aware of, case mouth slightly smaller than bullet dia. to get proper bullet tension.

I was referring to the body dia. of the Sig brass between the shoulder and the extractor groove being 0.424” which is max for that part of the brass and that’s what I’m getting on the few pieces of Sig brass I’ve ran through the 40 S&W FCD. All my other Sig brass has been sized with the 40 S&W carbide and 357 Sig steel sizing dies so I’ve not got many fired brass to experiment with just yet.

sig357fan

So why would you want to size to the MAX size. You normally size smaller then max to give yourself some margin for error. FCD is designed to size to MAX size not slightly smaller.

sig357fan
12-19-2011, 15:41
So why would you want to size to the MAX size. You normally size smaller then max to give yourself some margin for error. FCD is designed to size to MAX size not slightly smaller.

Not sizing to max, using the FCD to reduce the dia. of a fired round so as to minimize the amount of sizing the steel 357 Sig sizing die does on the body (between the extractor groove and the shoulder) of the 357 Sig brass.

sig357fan