If one was to pull down steel cased loaded Russian made 123gr 7.62X39 and reload them, slowly upping the powder charge...What would be the initial pressure signs one would see? remember...steel cases should be stronger than brass and berdan primer has those two small holes instead of the one larger on boxer It would be interesting to see if one could safely get a few hundred more fps out of this round. But still...there has got to be a reason the Russians settled on the 2400fps range with this round. Any thoughts? Wanna kill these ads? We can help!