Thread: Redundant Calibres

Greetings @Micky Duck and All,
Some .22 calibre projectiles had soft enough jackets that they blew up in mid air if driven too fast. With a fast twist this would happen at a lower velocity. Hornady SX springs to mind. These are tender projectiles though and I doubt if a slow twist would make them penetrate much if at all. Projectiles designed to penetrate have much stouter jackets so don't fragment like the soft ones.
I had an interesting experience using the plated Frontier projectiles in a two groove .303 barrel. Worth a try Nigel. Accuracy was nothing special and there was a spiral of lead plating on the target face where the jacket had ruptured. Jacketed projectiles shot fine, even 30 calibre ones. Always meant to try them in a 5 groove barrel but have not got round to it yet.
Regards Grandpamac.