Wow, this is such an important post
1st - how are you so sure that I'm not gonna blow up anything using 4F when everywhere is stated that my Pietta revolver is for 3F only? I'd like to read more about it. Better results in what way exactly?
2nd - That's a brilliant idea! Since there is such a tiny difference in diameter between .38 Special cases which I bought and very short 9mm cases fired by police at a range, maybe it really could be doable to resize them. I would need to get about 0.1-0.2 mm less wide diameter. You think that's possible? I'll certeanly try once I get all my reloading equipment, I have nothing to lose. But let's say I somehow manage to resize them. Those case are so tiny (short) that I can put only a round ball into them. And even with such a small projectile, there will be very little room left. Naturally, that space is obviously enough to shoot bullets with smokeless powder, but I don't want to have anything with smokeless for numerous reasons, and I even think it would be impossible and illegal for me to buy smokeless. So with smokeless out of the game, you think that maybe filling that tiny space (beneath the round ball in a very short case) with 4F could be a good solution?
I see this:
https://www.thehighroad.org/index.php?threads/fffg-vs-ffffg.792969/
And to answer your question... these small cases have several markings.
- "S & B" - obviously a manufacturer, Sellier & Bellot, which is a most common brand of ammo in my country.
- "9 x 19" - obviously that stands for 9mm diameter and 19mm length, although when I measure it, it's not exactly 19 mm, the real length is approximately 18.4 mm.
- "NONTOX" and "15"
18.4 mm length is 1.3 mm shorter than .38 S&W, which has a legth of 19.7 mm.