Well I'm getting on the 300 blckout wagon.

I'm setting up a fixture jig to cut 50 cases at a time.

Ive read that the rough cut length should be 1.2750.
and that after forming/necking, the final trim length 1.350"

The process I've laid out will hopefully let me
make 1000 cases, in 90-120 minutes. start to finish

Now I just need to find some junk/blank 223 brass.

I'll put an ad in the other section.....

D

After I size them..I run them through the aluminum jig that sells on the 300 forum.

sorry no help here. Good luck with your setup.