Swelling Cases

#1 · June 10, 2010, 3:09 am

I have been reloading with the SDB for many years but have run into a problem recently. My .45ACP cases are swelling.
I've inserted a picture to show the result. 99% fit the Dillon cartridge guide. The 1% that don't appear to happen with off-brand brass. I have checked the seating depth and adjust it and have also checked the crimping calibration...but it still seems to happen.

I'm using Rainier copper clad 230 gr. bullets. They are from a new box, but I have used them for years. I bought a different brand lately and tried one of those but had the same results.

Can anyone help me out here?
Dave

#2 · June 10, 2010, 7:20 pm

The size die normally sizes the case tighter than the bullet diamter, so you should see a bulge all the way around the case where the bullet base ends at. This bulge should be even.

Check the size position by putting a fired case in station 1 and pulling the handle down. The bottom of the size die should contact the top of the shellplate. If it doesn't, then the blue plastic friction plate is worn and needs to be replaced.

#3 · June 11, 2010, 9:52 pm

That is probably the issue. How do I obtain that friction plate?

#4 · June 12, 2010, 9:53 pm

Either phone or e-mail us to obtain one. If you e-mail, please include your mailing address.

#5 · September 27, 2010, 3:07 am

Just to close this out, what I ended up doing is filtering my brass. I found that I had had problems with certain manufacturers brass. I went through them all and culled the ones which I thought I had problems.

Bottom line:

Since doing this, I have had no problems.
I've reloaded another 1000 rds, checked each one with the Dillon case guide, and have not had to reject any.
So, I'm thinking my major problem was with the brass.
I still get a wrinkle or two in the loaded rounds...but they fit through the case guide well and seem to shoot just fine.

So as far as I'm concerned, this problem is solved.
Thanks,
Dave