MITCHB
Member
found some small pistol primers CCI 55o (magnum small pistol primers) can they be used on 40 sw safely
CCI SMALL PISTOL PRIMERS
- Thread starter MITCHB
- Start date
Register to hide this ad
Small pistol magnum primers generate a LOT more energy that a regular primer even more than a small rifle.
40 SW is a high pressure round to begin with, So I have to say on the safe side, NO it's not recommended but know folks have done so,
Times being what they are I would say try a few with a low (beginning) powder charge. Slower powder being better than a fast powder. HP 38 or Slower. What powders do you have?
40 SW is a high pressure round to begin with, So I have to say on the safe side, NO it's not recommended but know folks have done so,
Times being what they are I would say try a few with a low (beginning) powder charge. Slower powder being better than a fast powder. HP 38 or Slower. What powders do you have?
jepp2
Member
Well, I have a different experience than Rule3 offered. If you were using Remington primers, they specifically state on the side of their small pistol primers (1 1/2) NOT to use them in the 40 S&W, 357 Mag and the 357 Sig due to these being high intensity rounds. So Remington recommends you use their 5 1/2 primer which is a small pistol magnum primer.
If you do decide to use them, start low and watch for signs of pressure as you work up your load.
[URL=http://s860.photobucket.com/user/jepp2/media/Rem15Warning-2.jpg.html]
[/URL]
kwselke
Member
The latest loading pamphlet I have on hand is a 2012 Alliant Power mailer. Alliant is owned by ATK, which also owns CCI, Speer, and Federal. The .40 S&W loads listed in this manual specify CCI-500 primers exclusively. Will using CCI 550s work... probably, if handled properly. Is a primer type substitution safe... nobody knows until it is tested. Just remember if you cannot find a tested and published load in a manufacturer's load data you are doing your own experimentation. Do not be afraid to call bullet manufactures or powder manufacturers and ask.
Aticus
Member
At least one person on the net get's it. Thank you kwselke!
ArchAngelCD
Moderator, SWCA Member, Absent Comrade
Not in the 40 S&W but I have used CI-550 primers in the 9mm and I found I needed to drop the powder charge of W231 by only .1gr to achieve the same velocity as with a CCI-500 and the original powder charge weight.
Magnum primers will burn a little longer and a little hotter but they won't create a nuclear explosion. In most handgun cartridges you will find you only need to drop the powder charge bu .1gr or .2gr at the most to achieve the same velocities.
Magnum primers will burn a little longer and a little hotter but they won't create a nuclear explosion. In most handgun cartridges you will find you only need to drop the powder charge bu .1gr or .2gr at the most to achieve the same velocities.
I agree. And. In some calibers I reload, I have seen no difference in velocity or muzzleblast, etc. by switching to magnum.... depending upon powder and size of charge, I suppose?
Always best to drop down a little and work back up.
WILDPIG
