Cci 500 vs 550

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DefaultCCI versus CCI small pistol primers

I have been reloading 38 Special for a few years for target shooting. I normally use grain, diameter SWC above grains of Bullseye and a CCI small pistol primer. The rounds are shot in either a S&W or Ruger magnum revolver. The loading manual data is based on use of a CCI primer.

I was recently given a quantity of CCI small pistol primers. The manual shows these for some magnum rounds, but not for the 38 Special.

Should I be concerned, or does anyone see a safety issue, if I use these CCI 's instead of the CCI 's for reloading as described above?

Thanks.

 

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CCI says you should not use them in other than loads specifying magnum primers.
Primer Usage Chart

My advice is to buy a Explain to the wife that you need to do so in order to keep from having to throw them away. Actually, you will be saving money!

You're welcome.

 

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Thanks blujax The wife has her own 's, but, it never hurts to get another.

 

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There is no safety issue in using Small Pistol Magnum primers in Special. There are some powders that require the SPM for optimum performance even in Special, HS-6 being one.

The only way you will see any difference between satndard and magnum primers is if you have a chronograph and do a direct comparison between loads with the only variable being the primer. Generally the only difference you will see is a slight, but statistically insignificant, increase in velocity, with a higher extreme spread and standard deviation with the magnum primer compared to the standard one.

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This chart shows the difference in primer energy. Can you use them? Yes, but error on the side of lower powder charge until you see what your results are. There is more energy in a SPM than in a SRM. Read the "notes".

 

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My results differ from those of other handloaders apparently. I see a
slight increase in velocity and a decrease in extreme spread when I use
mag. primers rather than std. primers in moderate pressure 38 spl and
mag loads. I see this in fast burning powders like Bullseye, Titegroup and W that are not normally thought to require magnum
primers.

 

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The magnum primers will show a bit more velocity and usually will lower ES. It seems that you would expect a pressure increase, probably slight. Shouldn't be a problem, but I agree with Rule 3, start with a lower charge and see how it responds.

 

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I agree with the above suggestions, go ahead and use the magnum primers. There should be no safety problems at all.

Many reloaders think magnum primers are required for magnum ammo, that's not true. The use of magnum primers is dictated by which powder you use, not the caliber. Hard to ignite ball powders like HS-6, HS-7 W/H are better when a magnum primer is used. Don't worry, use them

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Thanks everyone, for the replies. I'll back off on the load a bit and try the 's.

Thanks again!

 

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Quote:

Originally Posted by iluvlabs1View Post

Thanks everyone, for the replies. I'll back off on the load a bit and try the 's.

Thanks again!

There's no reason to back off on a Special load that will be fired in a Magnum. You can double a Special's pressure and still not match the max pressure of a Magnum. If your original load is within standard Special pressures using a CCI primer won't even elevate that load to +P pressures.

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Can CCI Small Pistol Magnum Primers be used for 38 Special Bullseye Loads?

Can CCI Small Pistol Magnum Primers be used for 38 Special Bullseye Loads? EmptyGood to go in mid range 38 Spl!!

Post by jjfitch 9/17/, pm

mikemyers wrote:The only rounds I will be using them for are light loads for my Model 52, and I'll probably shoot some of them with my revolver.
Thanks!

Magnum primers may have a longer spark or brisance to better ignite "magnum" powders and or thicker cups due to higher pressures.  

My testing 9mm with CCI small pistol magnum primers revealed 25 fps increase with improved S/D. No pressure signs!

On another forum revealed similar results and some saw no difference!

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The Firing Line Forums > The Skunkworks > Handloading, Reloading, and Bullet Casting > D'oh! Accidentally bought CCI , not CCI


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Pond, James Pond

July 5, , AM

can I still use them in a Spl?

The manuals all say Small Pistol primers, so I suspect I know the answer, but hope dies last, and it would save me a trip to the gun shop to swap them for a box of s.

Can I get away with it this time?

If not, out of curiosity, what would be th outcome of using them in regular Spl reloads?


jcwit

July 5, , AM

drop your load back 10% and go for it, work back up if you wish to. You have no problem. Many bullseye shooters do this as normal practice.


Mal H

July 5, , AM

As jcwit said, that's not a problem. Just don't use them with a max powder load at the start. As always with any change in a component, start low and work up.

The difference between small pistol regular primers and small pistol magnum primers isn't as noticeable as, say, large rifle regulars versus magnums.

In fact, looking at the Speer manual, they say to use "CCI , " without any distinction in the actual load data sets. A new reloader might think you can use them interchangeably. That new reloader won't lose their gun or their fingers if they do. In general, it's not a safe practice to substitute primers without going lower with the powder charge, but in this one particular case (same manufacturer, small pistol primers), it probably is.


Pond, James Pond

July 5, , AM

Cool!!

And unexpected.

These will be used with my first tries in reloading, so will mainly be with either the starting charge or one of the small increments beyond it!

Thanks for the clarification.


Jim Watson

July 5, , AM

A friend of statistical bent once chronographed Special with standard and magnum primers for the same powder and bullet. The magnum primers gave slightly higher velocity and greater consistency.

I tested small pistol, small pistol magnum, and small rifle standard primers when the small primer NT cases started appearing on the range here. A small pistol standard might lose 25 fps versus large pistol standard, but a small pistol magnum made it back up. A small rifle standard NEARLY made it back up.

I loaded a good deal of 9mm with small rifle primers during the post-election shortages of and they did just fine.

Loading below the maximum, there are a lot of things you can do that are not strictly to "recipe."

But I would still like to encourage you to shop more carefully. Not all mispurchases are as minor.
(Stores here would not exchange ammunition or loading components, I don't know about the policy in Estonia.)


rclark

July 5, , AM

No problem. Really the only time this becomes a concern is when you are loading on the bleeding edge (high pressure side). Then changing primers could cause an over pressure condition. Backing off and working back up is the way to go in this case.

Primer sensitivity depends on the powder, not the cartridge. Unique for example is primer insensitive (tested over chronograph). Only a few fps different I've tested a few other powders too to put my mind at ease Now is primer sensitive. I got over fps difference (CCI and CCI) is a Spec load I tested. WLP was in-between the two. That translates to a lot more pressure so I stick with standard primers with it. You won't be using though in the Spec :) .


Mal H

July 5, , AM

But I would still like to encourage you to shop more carefully. Not all mispurchases are as minor.Excellent advice which should be heeded by everyone.

The number of threads we've seen starting out "Oh darn! I bought this instead of that. Am I going to be ok?" is not a small number, and it all stems from not being attentive to what you are buying.


Pond, James Pond

July 5, , PM

But I would still like to encourage you to shop more carefully.

Point well taken!!

Quite right. I think as time goes by, I'll be more clued up on the differences. I saw Small Pistol and so bought them. I didn't realise there was such a thins as Magnum Small Pistol, untill I saw some other print a little later.

I shouldn't buy new stuff when I'm in a bit of a rush!!


Ethan.G

July 5, , PM

dont worry too much about it 90% of reloaders i know have done the same thing. iv found i prefer magnum primers because of it hahaha


m&p45acp10+1

July 5, , PM

You should be fine. I use small rifle primer for spcl, and 9mm exclusively. Though all of my loads are nowhere near max. Most do good to make midrange. all shoot just fine with no signs of over pressure. All loads were worked up from the starting charge. I keep it to small rifle due to the fact that I can cover more calibers that way. I load for 6 calibers with one primer. I started this when small rifle were all I could get.


judgecrater

July 6, , PM

A local gun shop owner advised that he saw no difference in pressure using mag vs regular large pistol primers. I checked this out by contacting Federal's primer group. Federal said it would not change pressures. They did advise that the mag cups are harder (to withstand higher pressures of magnum loads) and might cause light strikes in some guns that may not strike the primers hard enough. If they work in your pistol, you are good. I have not had a problem with any of my pistols I have tried.


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500 vs 550 cci

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