FL decapping/sizing die

[Zamble]

[pacrat]

Is this a new issue with existing die? Or new die?

Are you certain that the problem is sizing related and not mechanical?

Have you marked the problem cases and checked to see where they are binding?

[Zamble]

[pacrat]

Are the offending cases Mil-Surp? If so you likely just need a separate "Small Base Sizing Die". For a one time use, on a single stage press, for MilSurp cases due to the heads being swelled from Full Auto firing in guns with generous MilSpec chambers.

To diagnose issue. Use a black Marker Pen to ink the neck-shoulder, and head area of a few offending cases up about 3/4 " from base. And cycle them. After ejection, or driving out with cleaning rod. Inspect for shiny swipes where the ink was wiped off. Odds are if MilSurp cases. The case heads will be swollen. And a standard sizer won't reach down far enough to deal with it.

[baih777]

Are you sizing mixed brass ?

[Zamble]

There is other brass mixed in. But to be honest the majority of it is Lake City. But the problem brass is by far a small fraction of the total brass I load.

[jimmykan]

If a small base resizing die still doesn't do the trick, you may need to use a roll sizer to get at the very base just above the case rim.

Calguns.net - Does anyone use a Rollsizer?

Or just discard those pieces of brass.

[baih777]

Are the offending cases Mil-Surp? If so you likely just need a separate "Small Base Sizing Die". For a one time use, on a single stage press, for MilSurp cases due to the heads being swelled from Full Auto firing in guns with generous MilSpec chambers.

To diagnose issue. Use a black Marker Pen to ink the neck-shoulder, and head area of a few offending cases up about 3/4 " from base. And cycle them. After ejection, or driving out with cleaning rod. Inspect for shiny swipes where the ink was wiped off. Odds are if MilSurp cases. The case heads will be swollen. And a standard sizer won't reach down far enough to deal with it.

Thinking the same.
Seperate all your LC brass and run them thru small base die. I use a RCBS when all else fails.

[FLIGHT762]

Have you measured the case datum length using a comparator or measured the case web to see where the hangup is?

I've only needed a S/B die for one tight chambered bolt Rifle.

All of my other, numerous non chambering hangups were directly caused by the F/L die not pushing the case shoulder back enough. Once measured, the die could be turned in a bit more and the cases would chamber.

Are you at the maximum die setting? I think I read that the carbide rifle dies don't like to be hard cammed over.

Also, improper or not using enough case lube will also cause cases not to be sized properly.

[divingin]

Are you by any chance trying to use a rifle carbide die like a pistol carbide die, and not lube cases?

Someone at the range I shoot at recently blew up an M1A doing this (well, to be fair that was only part of his problem.)

Carbide rifle dies are made for longevity, not to avoid lubing. From the Dillon website:

Sizing/Depriming Die
For high volume users, such as commercial reloaders, law enforcement agencies, and high power or service rifle competitors, we also offer .223 and .308 die sets with a full-length carbide sizing die. Lubrication is still required, but the increased scratch resistance and die longevity of carbide are of great benefit to these groups of users.

[Zamble]

My machine goes all the way down to where it is set. I believe I use enough lube, I have never had brass get stuck in the die.
I am using Dillon FL carbide .223. It stays setup on its own tool head.
Is there such thing as a small base carbide die?

[baih777]

Do you have a dillon 223 case guage ?

[bergmen]

Two things:

1) Make sure the case length is within spec. Resizing will generally stretch the case. I always have to trim my cases after resizing. Some need it more than others.

2) Make sure the dies is set to result in proper head spacing. I had the chambering issue with my .308 loads and found the head space out of spec. Adjusted the die to correct this and all is well again.

Dan