difference in Winchester & CCI small mag pistol primers - Graybeard Outdoors
 
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post #1 of 8 (permalink) Old 06-04-2019, 09:11 PM Thread Starter
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Default difference in Winchester & CCI small mag pistol primers

ran my 1st set of reloads with CCI (4" .357-140gr XTP) & liked that load;
ran out of CCI, now got Winchester;

should i back off a few grains on the next batch (of same bullet & powder), or is there not enough difference to matter.

also going to run some 158gr powder coated cast boollits for the next batch, but this will
be the first time with this combo.

thanks
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post #2 of 8 (permalink) Old 06-04-2019, 09:29 PM
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Probably, it depends. If your current load is near minimum, it should be OK. If it is more than half way from minimum to maximum, then backoff a little.

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post #3 of 8 (permalink) Old 06-04-2019, 09:45 PM
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Not knowing the characteristics of two different Mfg's of standard primers it is prudent to back off on the powder charge just a mite when switching...though I will admit to switching standard primers of multiple Mfg's without a change in powder (Wolf, Winchester, CCI, Federal). I load near the bottom end to middle of the powder Mfg's published range. The first "sweet spot" down my bore, if less than 1 MOA, is good for me. I don't shoot at the upper range of powder or velocity. I like a wide meplat, a heavy for caliber bullet, and a "lumbering" velocity for the "wallop" that does everything to the game that I need it to do. Dead is dead. The game won't know or care that I didn't use ALL of the potential energy that I could possibly squeeze through my rifle or handgun.

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post #4 of 8 (permalink) Old 06-05-2019, 03:17 PM
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Common reloading practice is with any component change, back off and start a work up again. But, the average reloader/shooter won't be able to tell the difference in a primer change, (possibly unless it's from standard to magnum primers).. If your load is near max., drop 10% and start over...

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post #5 of 8 (permalink) Old 06-06-2019, 08:49 PM Thread Starter
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i'm a little below the middle of the range, so i should be ok- thanks all
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post #6 of 8 (permalink) Old 06-09-2019, 05:55 AM
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to be real about any load you find in a loading manual is conservative. Primer change isn't going to blow up a gun. what you probably will see if your using fast pistol powders is a decrease in accuracy. Back when the primer shortages really hit I was down to 2 cases of cci small mag pistol for the only small primers I had. I used them in everything from the 32 mag and 38 spec and 9mm to full power 556 and 22250 loads. Never noticed any pressure problems with any of those rounds. But then I don't load over book recommendations any more. If you load is pushing the ragged edge in your gun it sure could cause a problem in that case though.

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post #7 of 8 (permalink) Old 06-09-2019, 05:57 AM
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by the way. I don't know if its still the case or not but about 15 years ago cci said that there standard small rifle primers and there mag small pistol primers were the same primer in a different box.

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post #8 of 8 (permalink) Old 06-18-2019, 10:10 PM
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What they all said. I recommend you read this article, and make up your own mind.


https://www.gunsamerica.com/digest/reloading-primers/


It is known that certain brand primers are harder than others. Winchester being the softest and CCI being the hardest.

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