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Old September 20, 2006, 10:21 PM   #1
Join Date: July 7, 2006
Location: Utah
Posts: 18
.45 acp magnum primer question

A friend gave me 1000 CCI magnum 350 large pitol primers. Are these the same as large pistol primers? The CCI web page says, "For heavy loads using ball propellants." Does 200 gr lead SWC with 4.8 grains of W231 fit that description? I would like to know if these can be safely used in my 1911.

I've read all the warnings about substituing primers but there seems to be some ambiguity here.

Help for a beginner would be appreciated.
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Old September 20, 2006, 10:57 PM   #2
Dave Haven
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Join Date: February 1, 2000
Location: near Flagstaff, AZ
Posts: 790
Magnum primers are "hotter" than standard primers - more energy; hotter fire to ignite heavy powder charges. Magnum primers are recommended "For heavy loads using ball propellants." They could cause higher pressures with easily ignitable powders. W231 is a ball powder, and some manuals recommend a magnum primer with it.
In your case, I don't believe you'll run into any pressure problems.
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Old September 21, 2006, 05:15 AM   #3
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Join Date: February 20, 1999
Location: home on the range; Vermont (Caspian country)
Posts: 14,270
testing required; Safety First

Safe, but.....

IME a change in primers can affect accuracy.
Sometimes better, sometimes worse, sometimes no change.

AT THE LIMIT, swapping primers requires backing down some and working back up, slowly.

And when using certain specific primers (like Winchester's Small Pistol Magnum or any-brand rifle primers in handgun loads) one must be more cautious.

Why we start below maximum and work our way upward.....
"all my ammo is mostly retired factory ammo"
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