SPP vs LPP

[Rayant]

Is there any advantage of SPP over LPP in the 45 ACP?

[ascast]

good question ! or in anything else?

[wv109323]

There is no accuracy advantage. If all your other pistol calibers are small primers then you do not need to stock or use LPP.

[M-Tecs]

The claim is the change was done for the new green primers.

[Bigslug]

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.

[Mk42gunner]

In my own personal opinion, .45 ACP should have been converted to small primers when the .38 Special was in the 1930's.

Robert

[charlie b]

Yep. I won't buy LPP brass anymore. That way everything I have uses small primers.

[Winger Ed.]

In my own personal opinion, .45 ACP should have been converted to small primers when the .38 Special was in the 1930's.Robert

My understanding was that when Browning invented/developed the .45ACP,
he cut down (large primer) .30-06 brass to do it with.
After that, it became one of those things where 'we've always done it that way' and use the LPP.

[scattershot]

I shoot both in .45 ACP, and I can’t tell any difference.

[Gtrubicon]

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.

[SquibCity]

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.

[35 Rem]

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.

[ioon44]

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.

[Slugster]

I've never found any accuracy difference between LPP or SPP in the .45 ACP.

[ddeck22]

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

[ioon44]

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.

[Martin Luber]

Some accurized 45 ACP guns have an off center primer hit. SPP may be hit on the edge of the pocket

[tinsnips]

I keep both small and large only because someday maybe small or large pistol primers will be like finding large rifle now .

[JCM45]

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.

[ddeck22]

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.

I think I've heard it about the 650 and up.