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For the first nearly 100 years there were only LPP 45 acp. When they first came out with the SPP acp cases, they were (and still are to many) the bane of acp reloaders. You never had to sort them, but now you do. If you are reloading on progressive, or even reloading on a hand primer, getting them mixed up is a pain.
In my experience, there is little difference (ballistically speaking). Most of what I reload (pistol) is SPP, so I like not having to switch back and forth between LPP & SPP setups. I bought a couple thousand SPP acp brass a couple years ago. Should be good for awhile.
In my experience, there is little difference (ballistically speaking). Most of what I reload (pistol) is SPP, so I like not having to switch back and forth between LPP & SPP setups. I bought a couple thousand SPP acp brass a couple years ago. Should be good for awhile.