Is there any advantage of SPP over LPP in the 45 ACP?
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Is there any advantage of SPP over LPP in the 45 ACP?
good question ! or in anything else?
There is no accuracy advantage. If all your other pistol calibers are small primers then you do not need to stock or use LPP.
The claim is the change was done for the new green primers.
Yup. When the lead styphynate-free primers began to show up - I'm guessing 15-20-ish years ago - the main chamberings on police ranges were 9mm, .38 Special, .40 S&W, and .45 ACP. Only the .45 used LPP's, so it made logistical sense to change the primer pockets so only one size of reduced hazmat primer was needed in a forum where little reloading was being done anyway.
Those of us who had been hoarding LPP brass for decades tend to regard it as a Hell-spawned monkey wrench thrown into our previously easy routine of not needing to check EVERY range-pickup case, but no, you don't need the extra juice of a LPP to light off the small charges of standard .45ACP loadings.
The main advantage to SPP - at least right now - is that it's what appears most available in this world that the 9mm seems to be quickly conquering.
In my own personal opinion, .45 ACP should have been converted to small primers when the .38 Special was in the 1930's.
Robert
Yep. I won't buy LPP brass anymore. That way everything I have uses small primers.
I shoot both in .45 ACP, and I can’t tell any difference.
My best friend and shooting partner only loads 45acp small primer brass, I only load large primer 45acp. We are constantly trying each others loads. There is absolutely no discernible difference between the two as far as accuracy or reliability are concerned.
i've done some chrono testing with lpp and spp (standard primers, both CCI) 45acp loads, and really don't see much difference. had 10-20fps differences between the two, or less on most loads tested. Like always, don't trust my testing, always work up your own loads safely.
The only advantage is that SPP are more available and cheaper now. I was annoyed when I got the SPP 45 ACP brass because of the time involved to sort them, but now glad to have the option of using the cheaper primer.
I shoot both in .45 ACP and have seen lower ES when chronographing the same loads but not any difference with accuracy.
I find the SPP is easier to seat when loading on my 550.
If you are loading for a 1911 then you can use SRP if you can't find SPP, just nice to have options.
I've never found any accuracy difference between LPP or SPP in the .45 ACP.
As others have said, the main thing is that you have flexibility in the primers being used. SPP are a lot cheaper than LPP now. Also, if you have to swap primer seating in the Dillon's, I've heard it's a pain. The Hornady LnL is fairly simple, but still requires a 5-10 minute operation
I have never timed swapping SPP to LPP on my Dillon 550, but I am sure I do it in a lot less than 5 min and it's not a pain.
Some accurized 45 ACP guns have an off center primer hit. SPP may be hit on the edge of the pocket
I keep both small and large only because someday maybe small or large pistol primers will be like finding large rifle now .
Switching to SPP for 45 ACP is fine, but what about 45 Colt and 44 Mag? I can't find LPP's anywhere in my area.