neorch
neorch
3 posts
Joined June 2009

9mm and .45 cal. seating die

Am currently reloading 9mm RN and .45 ACP RN. Does it require different die(s) to reload with flat point or semi-wad cutters in either caliber? Will the seating die work with round nose bullets and SWC or FP bullets?
dillon
Administrator
dillon
2,964 posts
Joined July 2007

RE: 9mm and .45 cal. seating die

The SDB conversion kits for these calibers include both an RN and a SWC/FN bullet seating stem. Merely swap out the stem as needed, and readjust.
Dsalkes
Dsalkes
1 post
Joined December 2017

RE: 9mm and .45 cal. seating die

Hi, I'm loading 124gr swc and 2r bullets, but de die on my square b doesn't seat them properly causing a bulge in the cartridge. I'm not having the same problem with 95 gr bullets.

What can I do? Should I change the seating die?

I'm doing this gor .380 bullets.

Regards,

Diego
dillon
Administrator
dillon
2,964 posts
Joined July 2007

RE: 9mm and .45 cal. seating die

Are you loading 9mm or 380 ACP brass?
9mm is a tapered case. The size die sizes the neck portion straight, so that when a bullet is seated, you will always see where the bullet stops in the case.
If you are using 124 grain bullets in 380 ACP, the bullet goes deeper into the case than the brass makers designed the internal taper of the case for. The bullet seats deep enough into the case to bulge the case out.