Hi,
I moved your reply from the other thread to this one...
Here is what they look like after resizing.
Thanks,
Alan
alank2
I have a set of Lee dies that are undersized, and they are the EXACT twin to the brass in your picture with the big wide band around the bottom. Also when seating a bullet, I get a really pronouned buldge at the base of the bullet in the brass as well...
Put those dies on the shelf and said "heck with this.." That is a mess looking to happen.
I then talked with RCBS (which is about all I use any way) and they sent me a die .1K under sized and that problem went away, meaning the Lee die was a tad to undersized, and also the RCBS allowed for a better 'base" at the bottom of the die to go a bit further down.
All this will probably be sticks to swallow with folks, but all this taking the huge buldge out, and shooting, and taking it out, and shooting,
one day, WILL have a pay day. Like putting ammo in and out of a mag all the time and weakening the spring. One day the place the "buldge was ironed out several times" is going to land at the six 'oclock area in the OEM barrel, and blow !
I promise you !
You can't place that type strain even on brass with out making it weaker in that spot each time.
The pics you have shown above here, withe the reall under sized squeezed down brass with the wide belt at bottom, begins to weaken the brass around the top part of that wide band at the bottom web area, and it 'will crack open'.
I don't know how you got a die so undersized with out ordering it, but that is what makes that band at the bottom, and ALSO will give you a
REAL tight friction fit on the bullet and a decent buldge usually at the base of the seated bullet.
I shoot my hottest loads through the Stock G20 barrel, and use the RCBS .1k undersize to iron that out, and fire it 'once more', and then they get loaded down to 'popper' play time stuff. (when in the OEM barrel).
If I want to save brass life a bit, I use the LW barrel in the G20..
Some Guys say they get dozens of loadings, and even more some of them, with their hot loaded OEM barrels. Folks can get away at times for years of doing this and that, but one day..... ! :whistling:
I know a nut case that never checked his oil in his truck, I looked at it one day caused the motor smelled like it was burning... The dipstick was BONE dry . I ask how long it had been since he added/changed oil, he hung his head and said about a year or so.... (older truck btw). Well then it one day freezes up or blows up. Point made.
Point is:
"One day." !
So, I also saw on page 3 here I think it was, your split case...
For many years I been shooting 11.0grs BD and 10.7grs BD, and 10.5grs BD With different cast bullets and XTP's and never a problem, at all in the stock OEM Glock barrel in G20/and G29. But again, I only shoot my hottest loads in them 2X, and then their loaded down. Use the AM barrel with ya want a "tad" more case life.
I had a split case (new case) the other day exactly like yours with WW new outta the sack. But was due to 'over pressure' in a load I fired.
The loads you describe are real common around here and else where in 180/200gr loadings in 10mm and
They really aren't case spliters. "In this 'case' of yours, (haha) I can't tell ya cause I was not there. maybe a boo boo at the bench a flicker in the powder scale, Got one seated waaaay to short, a bad case....:dunno: You may never know.
OR...
It may be that extremely squeezed down case (looks like to me at least in the pics on page 1) "bulding pressure", along with some other factors, especially IF you are having a tremendously tight friction fit and then a fairly tight taper crimp, and or if you are also seating a tad to deep, all this plus about one dozen other factors can cause problems.
If it were me, I would at least try another die, say RCBS carbide, and see if that doesn't stop the problem/s.
I tell ya man, mine in that Lee, look to the nth degree just like those pictured on page one, and they were bad news...
Good luck !
CM