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December 27, 2011, 03:45 PM | #1 |
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Magnum Primers and 2400
I have several hundred small magnum primers on hand that I used with 296. I'm currently using 14gr of 2400 with 158gr JHP and standard primers in my 357 but would like to use up the magnum primers. Would I need to reduce this charge or can I stay with the same charge?
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December 27, 2011, 04:01 PM | #2 |
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back off a couple of grains and work back up. obviously 2400 doesn't need magnum primers but as long as you work up to a load it ain't going to hurt anything
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December 27, 2011, 04:04 PM | #3 |
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I had better velocity with standard primers and a 158 XTP over 14 grains of 2400 than with magnum primers.......
Dunno why. Just is. |
December 27, 2011, 06:24 PM | #4 | |
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Quote:
Here was my test results back to back with .45 Colt : 18g 2400, 255 SWC, CCI-300 1022fps average 18g 2400, 255 SWC, CCI-350 1181fps average That is a 159fps difference which is 'significant'. If you were using Unique (not primer sensitive), you would be able to use either no problem.
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A clinger and deplorable, MAGA, and life NRA member. When guns are outlawed, only outlaws will have guns. Single Action .45 Colt (Sometimes colloquially referred to by its alias as the .45 'Long' Colt or .45LC). Don't leave home without it. That said, the .44Spec is right up their too... but the .45 Colt is still the king. |
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December 27, 2011, 11:50 PM | #5 |
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i've seen significant sensitivity with Unique and mag primers, 125 JHP. 9.4gr, std primer, no pressure signs. 8.8 gr and mag primer, very sticky extractions. This was on a GP100.
2400 and 45 LC, Blackhawk. 20 gr, std primer, 255 grain LSWC, no sign of pressure. 18 gr, same bullet and gun, Mag primer, sticky extraction. So my experience has me back off considerably from non mag primers first. Good luck and please post your results azklmsr |
December 28, 2011, 09:44 AM | #6 |
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I chose Alliant 2400 in the first place because it works phenomenally well in many loads without the use of a magnum primer. For me, I'm willing to give up the extra bit of velocity that H110/W296 will almost certainly provide for the ease of stocking only the primers I've used for so long... and not having to add magnum primers to my shopping list.
It has been the result of some testers and experimenters (NOT me) that using a magnum primer in a load with 2400 is not a great trade off and can disrupt accuracy and repeatability. The theory is, as I've read, that the strong primer blast and shock starts a forward movement of the bullet before a proper burn and development of gas can do that work. I'm sure this is quite dependent on bullet pull and/or crimp. I have NOT come up with this theory on my own, I have NOT done my own testing and I will NOT guarantee that this is anything more than a theory, but it's not something I simply came up with in my own head to justify my avoidance of magnum primers. To the OP: It's a horrible idea to insert a magnum primer in to ANY load developed with standard primers without reducing the charge and working back toward it. Always has been, it always will be. This is a very basic rule in most any load manual.
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Attention Brass rats and other reloaders: I really need .327 Federal Magnum brass, no lot size too small. Tell me what caliber you need and I'll see what I have to swap. PM me and we'll discuss. |
December 28, 2011, 12:18 PM | #7 |
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Concur with Sevens.
I have been using 2400 for over 40 years now and have never used magnum primers. |
December 28, 2011, 12:40 PM | #8 | |
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I remember putting an eight foot length of news print paper on the ground in front of my .44 magnum and shooting...There was so much unburned 2400, one would think, "There has to be something wrong." But, that is just how it was. |
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December 28, 2011, 12:54 PM | #9 | ||
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Quote:
8.5g Unique, 255g SWC, CCI-300, 977fps, 17 SD, 56 ES 8.5g Unique, 255g SWC, CCI-350, 985fps, 21 SD, 82 ES Quote:
__________________
A clinger and deplorable, MAGA, and life NRA member. When guns are outlawed, only outlaws will have guns. Single Action .45 Colt (Sometimes colloquially referred to by its alias as the .45 'Long' Colt or .45LC). Don't leave home without it. That said, the .44Spec is right up their too... but the .45 Colt is still the king. |
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December 28, 2011, 01:01 PM | #10 | |
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Join Date: February 12, 2009
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Quote:
__________________
A clinger and deplorable, MAGA, and life NRA member. When guns are outlawed, only outlaws will have guns. Single Action .45 Colt (Sometimes colloquially referred to by its alias as the .45 'Long' Colt or .45LC). Don't leave home without it. That said, the .44Spec is right up their too... but the .45 Colt is still the king. |
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December 28, 2011, 01:18 PM | #11 | |
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Quote:
It's good habit and a fine guideline to NEVER switch out a primer and substitute a magnum primer in it's place without re-working the load. As you say... yeah, the world isn't going to end if you do it in a medium or mousefart load. Still not a great habit to get into.
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Attention Brass rats and other reloaders: I really need .327 Federal Magnum brass, no lot size too small. Tell me what caliber you need and I'll see what I have to swap. PM me and we'll discuss. |
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December 28, 2011, 01:21 PM | #12 |
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I'm also with Sevens. I've used 2400 in the 70s and bought a can last year. It's faster and cleaner burning. I've used it in +P 44SPL and 45LC loads and like it.
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December 28, 2011, 01:24 PM | #13 |
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Oh, also... 2400 still leaves a bit unburnt in any round I've used it in. New production Alliant 2400. Just how it runs, I suppose. Still works great and I don't worry about it.
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Attention Brass rats and other reloaders: I really need .327 Federal Magnum brass, no lot size too small. Tell me what caliber you need and I'll see what I have to swap. PM me and we'll discuss. |
December 28, 2011, 02:29 PM | #14 | |
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Quote:
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December 28, 2011, 03:46 PM | #15 |
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I don't know -- and honestly... the loads I use work so well that it's just not a concern I care about fixing. The unburnt particles don't bother me, they don't slow any of my guns down, they don't really matter to me because the load performs so well.
It definitely does seem to be a calling card of 2400... unburnt granules.
__________________
Attention Brass rats and other reloaders: I really need .327 Federal Magnum brass, no lot size too small. Tell me what caliber you need and I'll see what I have to swap. PM me and we'll discuss. |
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