I would like to get y’all’s opinion on something. Several years ago, I came across several hundred cast bullets that had gas checks seated on them but without sizing or lube. They miked 0.314” and weigh about 180 gr.They had been very neatly stored in old cardboard ammo boxes. A couple of years ago, I lubed some with Lee liquid alox and loaded them over a light load of 2400 in 7.62X39 cases. In my CZ 527, they shot very well, sometimes approaching 1” at 100 yards. I know you’re not supposed to seat gas checks below the neck, but it worked well and apparently the GCs are staying put or the accuracy would be awful.
I was loading some more this past week and realized I’d used the powder charge from a 38-55 cast load (proving once again that you don’t need to load from memory) and had to break the loads down. The gas checks all came off and stayed in the case, causing me to have to discard them. The entire process made me rethink shooting these in the 7.62X39.
What would happen if a GC came off in the case before I fired it? Should I rethink shooting these long GC’ed bullets in the CZ? Here is a picture of the bullet, a loaded round, and a group I shot yesterday measuring a little under 2”. As you can see, the bullet shank and GC sit well down into the case below the neck.