.45 ACP Small Primer v Large Primer loads

Discussion in 'Reloading' started by Buckeye Glocks, Oct 8, 2012.

  1. The nincompoop who commited the sacrilege on the Holy 45ACP by putting a small pistol primer pocket in a 45ACP case should be tared and feather, have his micrometers smashed and finger nails removed.

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  2. I did not realize the depth of loathing for the SP .45! I guess I am not picky. So, any of you that want to get rid of your SP .45 brass - send me a PM and we can make arrangements to alleviate you of that scourge. Who knows maybe a few LP .45 will sneak into the mix.

  3. IT was an engineer @ ATK that has a 9mm fetish.:upeyes:
  4. I don't use the small pistol brass at all and just yesterday, finished sorting all of my brass and tossing the SP brass in the scrap bucket. If more manufacturers change over, I may take another look at that but for now, that's how it stands.

  5. If you are throwing them in your scrap bucket - toss them in a bag and I will pay the postage for you to send them my way.
  6. The loathing is caused by real problems for reloaders! These cases are dangerous!

    On a 550, if a SP case sneaks in, it is possible to almost seat a large primer. It will dangle out of the case and jam up the shell plate. The only way to remove it is to decap the case again. And this extra decapping double charges the case at station two! This is a serious issue for the unwarry. Yes, I know, just remove the charged case before the second decapping and replace it after priming another case and before rotating the shell plate.

    On a 650, the dangling primer won't jam up the shell plate and the case can be easily removed. The only potential problem is being overexuberant in seating the primer and detonating, not only the primer under the case, but the entire chain of primers back up through the tube. I am not saying that I have ever even heard of this event occuring in just this way but there is a video of the results of at least one chain fire on a 650:
    [ame="http://www.youtube.com/watch?v=ZTmtJj-mick"]Dillon Primer Detonation - YouTube[/ame]

    At least on the 550, only one primer will detonate.

    On the 1050, the SP case jams up the machine at the primer swaging station. The ratchet mechanism won't allow the operator to back out and some intervention is required. There is also a possibility that the press didn't completely stroke the powder measure depending on how the operator intervenes.

    On the RCBS Green Machine, the primer station is directly under the powder measure. An exploding primer will probably not cause a huge issue but the BATF was concerned enough to write me a threatening letter about their interest in future events. After I blew up a primer on this press, I immediately ordered a 1050.

    It's easy enough to sit back an giggle about the debate over SP vs LP but the SP brass poses a significant hazard. Sure, you can try to separate your brass. Yes, you can try to pick up only YOUR brass. But, in the end, you will inevitably pick up some SP cases and you WILL miss them when you sort. If you sort... I don't sort my cases; I don't even look at them.

    At the moment, I have about 5000 empty .45 cases. How many do you suppose are SP? How many passes will it take to catch them all?

  7. I use a single stage press. I usually do small runs when I load. I have the time to check all my cases.
    You did an excellent job of explaining the problems they pose when running a progressive press. If I ran a progressive I would probably hold them in the same contempt as you and others have explained.
  8. Oh the Horrors!!!!!!!
  9. It's obvious he had 'issues' - but I cannot see how leaving off the ejector wire can cause that. His explanation doesn't seem plausible.
  10. He talks about the case feeder mechanism jamming an empty case up against a loaded case that shouldn't be there. He suggests that this pushed the shell plate out of alignment enough to detonate a primer.

    Beats me! I don't know if this is possible or not. But there is no question about the chain fire. It's pretty impressive!

    I have popped a couple of LP primers trying to seat them in a SP case and I can't say it won't happen again. The only saving grace is that I do my .45 loading on a 1050 so the press jams up when the case hits the swaging station.

    The only opportunities for a primer incident with the 650, as I run it, comes from .223 and 9mm crimped cases. Those have nothing to do with LP vs SP.

    I may just buy a caliber conversion for the 1050. That would solve the .223 problem forever. We aren't shooting the 9mm very much so it just isn't a problem.

  11. I'm not buying the safety issue at all, unless you are just a handle puller. I load a ton of 45acp. It's not possible to even come close to seating a LP in a SP case, it just won't fit. I get the occasional one in the 650, it just prevents me from seating the primer, nothing else. So all you need to do is remove the offending case & proceed. Since the priming on a 550 or 650 is not on the down stroke, nothing advances. So it's more an annoyance than anything else. If you are pulling the handle that fast, with that much force, you have other issues reloading. I have NEVER detonated a primer in my press, every, not in more than 250K rds on my 550 & 650.
    #31 fredj338, Oct 9, 2012
    Last edited: Oct 9, 2012
  12. There are some cases, like S&B, where the primer pocket is very tight. The difference in force between seating a primer in a tight pocket and popping one against a SP case is not all that much.

    For me, it has happened twice. It's pretty certain that it will happen for others.

    I wonder if the fact that I use Federal primers has anything to do with it. They are reputed to be more sensitive than other brands such as CCI.

  13. Hoser

    Hoser Ninja

    The last batch of 45 ACP that I loaded was with range brass. There was some SP brass mixed in. Out of 2,000 pcs I pulled out about 40-45 pcs.

    Crazy I know, but I went through and culled out all the SP brass ahead of time.
  14. Zombie Steve

    Zombie Steve Decap Pin Killa

    Leave the threads about big-boy cartridges to the big boys, Heather.


  15. I have tried the same thing. The problem is, I can't achieve perfection. In spite of my best efforts, I still get 1 or 2 per thousand into the hopper.


  16. When they start making 10mm with SP primers I am going to throw a Big Boy hisse fit. Just to fit in.
    #36 Colorado4Wheel, Oct 9, 2012
    Last edited: Oct 9, 2012
  17. :agree:
    I have popped 3 primers. A friend of mine that I know has set off the whole tube at least 3 times that I know of. I was there when he set off the first one. Other than destroying some parts and putting a hole in the ceiling. It really is not that big a deal that everyone tries to make it out to be. The 650 press does its job.
  18. Zombie Steve

    Zombie Steve Decap Pin Killa

  19. shotgunred

    shotgunred reloading nut

    You guys should all just send me the small pistol primer brass.
  20. njl


    Actually, if you pull the handle just a little (raise the shell plate just a little) so that the shell plate is above the primer slide cup, there's a channel in the shell plate which I assume is there so that you can remove a partially primed (or a decapped case which has partially reseated the primer which had stuck to the decapping pin). I've had to do the latter numerous times. I suspect, if you managed to partially insert a LP into a SP pocket, you could remove such a piece of brass this way. I'm not volunteering to try it.

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