BlackSheepofChaplin
BlackSheepofChapl...
9 posts
Joined January 2018

bullets shoved into case when slide closes

Hi. I'm loading 185gr semi-wads for a Sig P220 and an 1911. When I drop the slide on both guns on this ammo, the heads get knocked back into the case a little bit. Not completely loose, but enough for me to worry about a compressed load. The only way to prevent it seems to be to crank the station #4 die all the way down, but then i worry about over crimping. I'd love to hear some recommendations other than shooting round nose. The OAL is 1.185-ish. Thanks in advance.
dillon
Administrator
dillon
2,866 posts
Joined July 2007

RE: bullets shoved into case when slide closes

How much are the bullets being pushed back? A few thousanths is not uncommon. Your crimped case mouth should measure .469-.471" at the case mouth.
BlackSheepofChaplin
BlackSheepofChapl...
9 posts
Joined January 2018

RE: bullets shoved into case when slide closes

Thank you.
BlackSheepofChaplin
BlackSheepofChapl...
9 posts
Joined January 2018

RE: bullets shoved into case when slide closes

Hi,
I tried adjusting the crimp die all the way till it bottoms out and the closest I can get is .472 to .474. Any recommendations would be appreciated. The bullets are lead 185gr. semi-wads.

Also, I'm seeing a lot of bulge in the case after crimping. Is that okay?

Thanks
Bucolic_Buffalo
Bucolic_Buffalo
58 posts
Joined June 2016

RE: bullets shoved into case when slide closes

Ideally, you will not want that bulge you are seeing. That is increasing with more crimp. Remember that this is a taper crimp, not a roll crimp. So you are effectively swaging the round down to size with this increased crimping force.

Your lead rounds are probably .452. I just measured a few Starline cases for wall thickness at .010-.0115. So lets use .011. .011x2=.022+.452=.474 and that's with no crimping applied.

A case will have been resized to about .445-.450 inside. So there is some tension. You want to hit that place in crimping where you can see the outline of the bullet, but not really have that wasp-waisted look. Maybe a tiny bit less as long as the bullets are not being shoved back into the case.
BlackSheepofChaplin
BlackSheepofChapl...
9 posts
Joined January 2018

RE: bullets shoved into case when slide closes

Hi. Thanks for replying. I cleaned the die out and readjusted. I can now get them to .471, but no smaller. I am still getting a bit of wasping, but, oddly, only on one half of the case. I guess that means the bullets aren't terribly concentric. They are Roger's Better Bullets from Kings.
Bucolic_Buffalo
Bucolic_Buffalo
58 posts
Joined June 2016

RE: bullets shoved into case when slide closes

"only on one half of the case"

Somewhere around here the Dillon folks explained this in a recent thread. Your not quite centered. You may need to loosen your dies with a case in each stage and then lock them down to center them. Your manual should describe that procedure.
BlackSheepofChaplin
BlackSheepofChapl...
9 posts
Joined January 2018

RE: bullets shoved into case when slide closes

Very interesting. I thought for sure it was the bullet. I will check the manual. Thanks for your recommendations and time.