9mm: buldge in case

[D53]

So I recently started reloading 9mm. I noticed that my first five ( and so far only five) rounds have a buldge around the lip of the casing.

These are once fired brass, tumbled, primed/sized/and bullet is loaded useing: a Lee manual hand press and Lee Carbide dies. And Berry's MFG 115g preffered plated bullets.

I followed all the directions when setting up my dies according to the Lee manual for the dies. Other then the bullet seating directions which tells me to insert the die all the way until it touches the cae holder when at ful stroke up, then back out 3 full turns. But when I did that it would press the bullet way too far into the brass case, so I grabbed a factory WWB round and placed it in the case holder and adjusted my die to that spec.

My rounds are coming out identical in height to factory loaded ammo, but I have that bulge and I just want to see if that will cause any problems?

Thanks for any info. I added a photo but its kind of hard to see the buldge in the case.

[joelogic]

Just chamber it, to check. Should be ok.

[buffybuster]

That "coke bottle" shape is actually what you want. It means the resizing die is doing it's job and there's good neck tension. The bulge is from the bullet being seated.

[D53]

Just chamber it, to check. Should be ok.

All chambered fine, just checked.

That "coke bottle" shape is actually what you want. It means the resizing die is doing it's job and there's good neck tension. The bulge is from the bullet being seated.

Right on, thanks. Just curious, why does factory ammo not come like that? I know that .45 does, but I have never seen or noticed 9mm having that "cokebottle" look

[Hans Gruber]

I get this too when I use XTreme plated bullets, less so with jacketed bullets it seems. They all run flawlessly through my pistols.

[J-cat]

Right on, thanks. Just curious, why does factory ammo not come like that? I know that .45 does, but I have never seen or noticed 9mm having that "cokebottle" look

Because factory ammo is not made using "your" reloading dies. Factory ammo is made on "their" dies which do not size the case to the same degree. The reason "our" dies size more is due to springback. Brass springs back more and more the harder it gets. Brass gets harder with every firing. "Our" reloading dies are made in such a way that brass reloaded many, many times still is able to provide adequate tension on the bullet, even with increased springback. This is why you see that coke bottle effect. If you were to resize a case on it's 50th firing, the coke bottle effect would be less noticeable.

Factory dies are looser because they don't have to worry about springback as the brass is nice and soft.

[bohoki]

lee carbide dies are straight but in reality 9mm is a tapered case so it makes the cases smaller all over and the bullet seating swells up the mouth a little

my 30 carbines end up looking like that too

[bubbapug1]

u did good, nice crimp...

[fullspeed1]

It's normal