any reason to NOT use magnum primers

bpost

I have loaded several thousand .45's using standard primers and 5gr of 231 pushing a 200gr SWC. I am out of standard primers now. I still have aboyt 3,000 to load.

Is there a bonified rason to NOT use some of the several thousand magnum pistol primers I have. I know I should drop the powder charge by a couple of 1/10th's my concern was more along the lines of pushing the primer out of the pocket too much before the pressure built from the powder burning.

I use magnum primers all the time in .357 and .38 loads. I was given about 20,000 of them and would like to use them up rather than buy more standards for now.

Does anyone have an idea that is not based on conjecture if this is a bad thing to do?

FrancF

My rule is if you use Mag primers drop your powder charge buy 1/2 grain.
Pistol might be diff. But, I have found on hot days in my varmint guns powder that reacts to temp changes like h380 and a few others, it can be a bad thing if your pushing the limit (Max) powder.


NRA Life Endowment Member

perry shooter

Hello one reason may be that the cup is harder/thicker to withstand high pressure loads and if you have a pistol with modified / weak fireing pin hits it could lead to misfires. "PRAISE THE HARD-BALL GUN"

lawdog44

be careful of powder choices use of mag primers couid result in high pressure this is compounded by bullet seating depth in pistol
rounds like the 9mm,40sw,& 45 apc also reduction in powder charge
in some cases like in the use of H-110 could result in detonation
instead of powder burn resulting in damage to fire arm and or injury
to yourself or bystanders I have been reloading about 25 years and
have seen these things happen . good shooting [:)][:)][:)]

1911a1-fan

I use nothing but magnum primers in my 45's, now Winchester is making only "standard or magnum" large pistol primers, before you could get both, and I found that the magnums added about 30 fps, but you do get a cleaner burn on the powder, in addition I used your recipe with 231 always using magnum primers{when I used to use 231}