Not enough neck tension?

[Walkalong]

If the brass (like the ones I pull out only mic .735) it would make sense to me that they aren't long enough to go into the tapered resizing die far enough to get the .003"press that you need. I would think they would show as oversized even if your die is in spec, as I suspected your wasn't, and thin cases just complicate this. Maybe I'm way off base with this analegy of my loading process but I think it's why I don't seem to have resizing problems with my 9mm anymore. I have found brass from .735 being the shortest to .755 being the longest and my dies seem to work best in a .010"range. I throw the short stuff in a seperate container and trim anything longer then .753 back to .750. This also helps with setting the taper crimp die to get a more consistent crimp.

While this is all true, due to the tapered case design, I would not want a sizer that depended on long brass to get sufficient neck tension. I guess I am too lazy to measure all my 9MM brass. I do check all my sized 9MM brass in a case gauge, which many don't want to bother with. I could scrap my batch of 9MM brass, sort out a couple thousand plus of all the same head stamp, measure them all, tossing any out of a certain range, which should only take a couple hours or so, but I bet I can't shoot well enough to show the difference.

 

[otterk]

I had same problem with hornaday 480 dies.The sizing die was to big,called hornaday they sent a new one.Customer service very good.Quality control not so much.

 

[tightgroup tiger]

While this is all true, due to the tapered case design, I would not want a sizer that depended on long brass to get sufficient neck tension. I guess I am too lazy to measure all my 9MM brass. I do check all my sized 9MM brass in a case gauge, which many don't want to bother with. I could scrap my batch of 9MM brass, sort out a couple thousand plus of all the same head stamp, measure them all, tossing any out of a certain range, which should only take a couple hours or so, but I bet I can't shoot well enough to show the difference.

Why do you check all yours with a case guage before loading them? Because it makes for a smoother operation through the loading process and less problems in your pistols and safer ammunition.

I don't check for length to improve my shooting, I do it for the piece of mind that I know I will have less problems while running them through my press, the same press you use, and have less to worry about as to getting the best neck tension I can get. That means alot to me.

My dies work the same as yours and everyone elses do and are stock factory RCBS dies from my LGS.

Out of 1000 rounds of range brass I probably pick out 40-70 rounds that are under .742. I probably get maybe 20-30 that are longer than .752. It don't take much to trim 30 9mm shells.
These get thrown right back into the 900 or so that are in Sammi spec for length.
I don't sort out headstamps. My guns don't seem to care and it also doesn't improve my shooting so why should I do it.
I never understood the whole sorting headstamp thing with pistol cases. If they shot through the gun fine the first time, they will shoot through it again if they are loaded correctly. I have no shortage of 9mm brass so I don't bother messing with the ones. I don't like changing the adjustment on my dies once I have them working right.

You check all yours with a case guage, That probably takes the same amount of time it takes me to sort for length.

 

[SC_Dave]

More information

Contacted Hornady today. After measuring the ID of the titainium sizing insert Hornady said I had a 38 cal sizing ring in my 9mm die. They are shipping me a new die today.
David

 

[tightgroup tiger]

Good God, no wonder you were having problems.

All die companies make mistakes, including RCBS, I'm anxious to here if the new dies this corrects your problem and best of luck to you.

I have a set of Hornady pistol dies in 327 Fed mag and are really happy with them. Since they told you that, I wonder if this is something that already came to the surface with Hornady, before you started having problems. I'm glad you measured your die,but like Walkalong said, it doesn't work to well with dial calipers and he's right, but it can be done to some degree, and I very glad Hornady is taking care of you. I wouldn't expect anything less.

Good deal.

 

[SC_Dave]

I'll post here when I get the new die and try it out. As Walkalong said, it is difficult to measure the ID of the die. I removed the decap pin and did the best I could with the ID side of my caliper. I could measure just inside the lip and slightly further in but it was enough for Hornady to say it was the wrong insert. They didn't hesitate one second, said I'm sending you an new die today. Good customer service.
David

 

[Walkalong]

You need a special inside micrometer, or pin gauges. Link

Hopefully the new die solves the problem.

 

[Walkalong]

Why do you check all yours with a case guage before loading them? Because it makes for a smoother operation through the loading process and less problems in your pistols and safer ammunition

I do it because I have a 9MM with a SAMMI minimum chamber, and anything fatter than .3915 near the web can jam the pistol.

Yes, it probably takes as long or longer than sorting by length, and I said as much. I just haven't bothered to do it.

My dies work the same as yours and everyone elses do and are stock factory RCBS dies from my LGS.

Thank you.

 

[SC_Dave]

Issue Resolved

OK, problem solved! Got my RCBS dies in and the size/decap die fixed the set-back issue. Thanks for all your help guys!
David