FL sizing die problem

[PD Gohil]

300 blackout
Redding dies
Cleaned 1x brass.
Lanoline based lube


The full length sizing die is crushing my brass... Take the stem out and it does fine,

This is the first time I've used this die, are there not my first time setting up and using Redding stuff.
Any ideas???


Thanks
PGohil
WV

 

[Dimner]

To remove a variable. Try spraying the lube not only on the body, but also in side the neck of the brass.

Also I would mic the stem at the largest size and see how it relates to the mouth of your fired cases. Also check for defects or burrs in the stem

 

[PD Gohil]

Stem mics at . 3065, I even tried using some Hornady case lube on the inside and outside of the neck but somehow it seems like an alignment issue..... Could not find burrs or issues with the stem

 

[gunsandgunsmithing]

Any chance the part that holds the expander stem is bottoming out on the case mouth? If not, seems like it would have to be the expander ball, which is hard to imagine but maybe. FWIW, the decap pin should protrude about 1/8" below the bottom of the die. Maybe an adjustment but seems unlikely.

Oh, another thing relating to adjustment...If the expander is set to a length where it's expanding at the time time the neck is being sized down, that might well do it. A pic of your die, showing the decap pin and how far it protrudes might help.

 

[PD Gohil]

Right, I generally set the decapping pin to barley protrude , always worked fine... My dies has 2 pieces they hold the decapping pin, a large and a small one. They both do it...

 

[K22]

How are you setting up your F/L die? In other words, how are you determining how far to turn the die down in the press?

Are you using a bump gauge and caliper to determine fired case head space and adjusting your die to give you the optimum bump (.001 - .002 bolt rifle; .003 semi-autos)?

To eliminate the expander variable, do a test by sizing a case without the expander assembly. If the expander is grossly oversized and / or the sizing die is oversizing the neck, this could cause the expander to crush the neck into the case.

 

[PD Gohil]

I set the die to bottom out at the end of the stroke with a slight "cam over" . No bump gauge.

And the die does fine without the expander assembly, just doesn't size the neck.

 

[gunsandgunsmithing]

Right, I generally set the decapping pin to barley protrude , always worked fine... My dies has 2 pieces they hold the decapping pin, a large and a small one. They both do it...

Barely would need to be quantified for my feeble mind. Bottom line to that scenario is if the expander is still in the neck while it's also trying to size the neck down, you may have a problem. The more it protrudes, in that scenario, the better, to a point of course...and if I'm think about it right. Simple enough to check, though. Just run the decap pin down a bit and try it. Go too far and you can knock the bottom out of the primer pocket.

 

[ShtrRdy]

If this is a bushing die, what size bushing is in it?

 

[Rocketvapor]

Only crushes when the stem is in the die.
FL without is OK.
Set the stem really deep (just as a test) and run it through the neck.
Don't cam over, just ease the stem through the neck
Probably won't crush the case.

If so, then stem is going into the case after the neck is being sized down.
Stem needs to go first through the neck and come out last.

Set it up wrong and you could end up with a STUCK CASE.

 

[bozo699]

I’ve never loaded for a blackout so I’m talking with no personal experience however there’s virtually no shoulder which sets it up for possible failure already, if you blew them out from .223 and didn’t anneal then there’s another problem. I would remove the expander ball , size it then run the appropriate mandrel maybe in a couple steps to get your desired neck tension.
Wayne

 

[PD Gohil]

I win the idiot award. ‍

Definitely did not have the stem deep enough. Ended up with the decapping pin 1/4-in below the die. Then it worked perfect. several people mentioned this before but I didn't get it until #RocketVapor Said it in a way that clicked

Sure appreciate all the help.!!!!

PGohil
WV

 

[PD Gohil]

I guess this is the shortest case I've ever worked with so that's why it threw me so bad.

 

[drop_point]

Are they actual .300 BLK or converted 5.56? Some brass is too thick and the necks need turned.

 

[Fast14riot]

Yep, expander ball too high. Not enough room for the brass to zig-zag around the expander and into the neck.

 

[PD Gohil]

No it was factory 1x 300blk brass. Just a goofy mistake on my part.

 

[boltfluter]

300 blackout
Redding dies
Cleaned 1x brass.
Lanoline based lube


The full length sizing die is crushing my brass... Take the stem out and it does fine,

This is the first time I've used this die, are there not my first time setting up and using Redding stuff.
Any ideas???


Thanks
PGohil
WV

I am sure those will fire form out! Lol. Glad you got it figured out.
Paul