Dillon Resize Die: Potential setback Issue
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The wife and kids currently aren't home. When the cat's away, the mouse will play.
Going upstairs to convert the 1050 over to 9mm right now. I don't have many empty 9mm cases. I'm hoping there will be a few FC headstamps in what I have available.
Hey Jim, in the previous post where I quoted you, I forgot to add that I've read many good things about the EGW/Lee U-die. I just ordered one from Midway. Very anxious to try it out.
Dudedog
Contributing Member
Don't know about Dillon dies but in 9mm my Lee size dies sizes tighter than my Hornady 9mm die. (both of the Lee 9mm dies I have do) I had set back issues (push on board test) with some brass sized with the Hornady die that was fine if I used the Lee die.
I sent the Hornady die back to them to check out and they said it's in spec. so I just use the Lee die even it it is not quite as smooth as the Hornady.
My RCBS and Lee .45 sizers seem about the same.
So yes some dies will size tighter and I would imagine you might find "tight" and loose ones from the same company.
Trying more crimp won't fix the issue it's not crimp related.
I sent the Hornady die back to them to check out and they said it's in spec. so I just use the Lee die even it it is not quite as smooth as the Hornady.
My RCBS and Lee .45 sizers seem about the same.
So yes some dies will size tighter and I would imagine you might find "tight" and loose ones from the same company.
Trying more crimp won't fix the issue it's not crimp related.
Using FC brass, I measured three cases. Post resizing, all three measured .3755 (whether or not my digital caliper is actually accurate to the fourth decimal place is anyone's guess).
There was no change post swage/expander.
i have had neck tension problems with FC, Blazer and Speer 9mm brass when loading Precision Delta FMJ 124 gn bullets. No such problem with RP, Starline, WCC and others. I bought the Lee U die and it fixed the issue. This was only a problem with the FMJ bullets. When I use X-treme plated bullets, I don't have set back regardless of the brass headstamp,
243winxb
Member
The Lee Undersized Carbide Sizing Die may solve the problem. Let us know when you get it. Check the expander diameter too. I read some cases have a taper, some dont.
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Load Master
Member
Instead of trying to point out certain brand cases or dies as the culprit to bullet retention, it would be better to understand that some bullets are on the smaller diameter of allowed (per SAAMI) dimension, that end up being in a resized case that internal diameter is on the larger, but still within allowed specs. The combination can produce less tension than ideal.
Other contributing factors, if the sizing die isn't screwed down far enough to the shell plate the case may not be going far enough into the die to be properly sized. This includes cases that are not of proper length.
My point, there are many other factors that can cause improper bullet to case tension. You need to check all of them, not just brands of dies and cases.
Other contributing factors, if the sizing die isn't screwed down far enough to the shell plate the case may not be going far enough into the die to be properly sized. This includes cases that are not of proper length.
My point, there are many other factors that can cause improper bullet to case tension. You need to check all of them, not just brands of dies and cases.
I'll do this later this evening. Full schedule today.
All of what you say is true, and I'm not arguing against that at all.
This is just a simple case of identifying the exact issue you point out with a certain headstamp, die, and bullet combination.
Gearhead Jim
Member
I recall reading about a similar setback issue, can't recall the brand of brass, but it only showed up with cases that had been sized/fired several times. Apparently the brass had work hardened to the point it wasn't gripping the bullet properly. Once-fired brass of the same make had no problems.
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