Large Pistol Primers ......

I use Large pistol mag primers in my light target cast loads in 30-06, 308, 303 and 8mm mauser without problem. most of them with 12-13gr of red dot and 180gr bullets. velocity around 1600fps.
I don't waste my precious large rifle primers for light cast loads. Used several hundreds of these round in 2022.
 
No issues today with Ginex Large Pistol Magnum primers in my .350 RM 180gr CamPro 0.356" plated & Blue Dot @1700 fps mv. Relatively low pressure probably way less than 1/2 max pressure for this round.

Fired several primed only cases first to check for pierced primers none all fine. Groups about same as with Large Rifle primers good for plinking.

https://i.imgur.com/jlZA2sF.jpg / https://i.imgur.com/DNiUKhH.jpg / https://i.imgur.com/wyiSrMS.jpg / https://i.imgur.com/g02OlIH.jpg / https://i.imgur.com/l5MpoZr.jpg

However I'm NOT recommending this practice for information only.
 
4fifty8 said:
No issues today with Ginex Large Pistol Magnum primers in my .350 RM 180gr CamPro 0.356" plated & Blue Dot @1700 fps mv. Relatively low pressure probably way less than 1/2 max pressure for this round.

Fired several primed only cases first to check for pierced primers none all fine. Groups about same as with Large Rifle primers good for plinking.

https://i.imgur.com/jlZA2sF.jpg / https://i.imgur.com/DNiUKhH.jpg / https://i.imgur.com/wyiSrMS.jpg / https://i.imgur.com/g02OlIH.jpg / https://i.imgur.com/l5MpoZr.jpg

However I'm NOT recommending this practice for information only.
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How many grains of powder? How was the case fill?
 
Ok, so how about small pistol in place of small rifle? I've got tons of small pistol and next to none in small rifle.... my problem is that the small rifle I need are to go in magnum loads like 454 casull and 450 Bushmaster, so I've been too chicken to attempt a load with small pistol primers
 
Ridersfan said:
Ok, so how about small pistol in place of small rifle? I've got tons of small pistol and next to none in small rifle.... my problem is that the small rifle I need are to go in magnum loads like 454 casull and 450 Bushmaster, so I've been too chicken to attempt a load with small pistol primers
Click to expand...

I'd be chicken to load up to 65,000 psi too! Do you have some watered down loads in mind, in the 30-40,000 psi max range? Then it would probably be worth contemplating.
 
saskgunowner101 said:
I'd be chicken to load up to 65,000 psi too! Do you have some watered down loads in mind, in the 30-40,000 psi max range? Then it would probably be worth contemplating.
Click to expand...

Both those 454 and 450 bm run around 45,000psi I think.... but I'd still like to see someone else do it first lol... I'm not afraid of catastrophe, I'm afraid of marring up my bolt face on either gun
 
A pierced primer won't mark your bolt face as it pierces where the firing pin touches it. You wreck your bolt face when primers leak around the outside of them between the case and primer.
 
I've wrecked a firing pin when it poked through a few primers during load testing. The hot gasses eroded the firing pin and made it "pointy" and it began piercing everything no matter what I loaded. I don't want to repeat that expensive, disappointing experiment again.
 
billdick said:
A pierced primer won't mark your bolt face as it pierces where the firing pin touches it. You wreck your bolt face when primers leak around the outside of them between the case and primer.
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My experience definitely says otherwise. It can and likely will chip or otherwise erode the boltface at the firing pin hole. The exact circumstances will be important but I have seen it myself with .357 Magnum and .308, unfortunately. A pierced primer caused so much damage to the firing pin and bushing of my .357 both needed to be replaced outright.
 
The thing is if a primer pierces in this experiment you should probably stop doing it. If you continue and wreck your firing pin and bolt face or what ever that isn't the primers fault. I know a guy that has been loading his 22-250 with large pistol primers for a couple years now without issue no pierced primers.
 
billdick said:
The thing is if a primer pierces in this experiment you should probably stop doing it. If you continue and wreck your firing pin and bolt face or what ever that isn't the primers fault. I know a guy that has been loading his 22-250 with large pistol primers for a couple years now without issue no pierced primers.
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It only took one in my case with the .357. The .308 was a bit more my fault since I didn't know the AR-10 could be so picky with loads and timing. As I said I have used LP in place of LR before. It can be done, I was only arguing against your comment that a pierced primer can't damage the bolt face.
 
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