Magnum primers in non-magnum loads?

[MD]

Is there an advantage or disadvantage or even danger in using magnum primers in regular loads?

I may be working up some loads in 7x57 and have 300 magnum primers on hand.

 

[gewehr76]

Each application call for different primer. Follow manual instructions. If you have only magnum primers then reduce the load by one grain usually that is enough to compensate in my experience. This can cause issues only if you loading at max load and max pressures.

 

[H4831]

Seat any large rifle primer, magnum or standard, of any brand, in your 7x57 and load with the bullets and powder that you usually use.
You will not be able to detect any difference in accuracy, pressure or any other factor of shooting.
Have fun and enjoy yourself in using your rifle.

 

[Tinman204]

Seat any large rifle primer, magnum or standard, of any brand, in your 7x57 and load with the bullets and powder that you usually use.
You will not be able to detect any difference in accuracy, pressure or any other factor of shooting.
Have fun and enjoy yourself in using your rifle.

I agree!!

I've used standard and magnum primers in many cartridges and it's never an issue.

 

[homeboy1]

Seat any large rifle primer, magnum or standard, of any brand, in your 7x57 and load with the bullets and powder that you usually use.
You will not be able to detect any difference in accuracy, pressure or any other factor of shooting.
Have fun and enjoy yourself in using your rifle.

My experience as well.

 

[stampede]

Magnum primers will generally give you a hotter load.
In my 357, 2400 with magnum primer and 14.4 grains is exactly equal in velocity to 2400 with standard primer and 14.9 grains. 158 JHP. A 0.5 grain difference.

(2400 powder called for a magnum primer in older books but now Alliant says you don't need magnum primers for that powder.)

 

[saskcop]

I use magnum primers for everything so that I can buy in bulk and not give it another thought.

 

[Hitzy]

I use mag primers in everything rifle except 222rem. For some reason it shoots better with standard primers. Everything else cannot tell any difference except a cleaner burn with ball and slow extruded powders using mag primers.

 

[BigUglyMan]

I always used magnum primers in anything I planned to use in cold weather. Never wanted to take a chance with rounds that I might be using at -30 to -40C.

 

[mbogo3]

Magnum in most everything........in a CZ 527 7.62x39 switching to mag primers shrunk group 50 % [same charge].........Harold

 

[medvedqc]

I always used magnum primers in anything I planned to use in cold weather. Never wanted to take a chance with rounds that I might be using at -30 to -40C.

cold wave in NS ....

 

[BigUglyMan]

cold wave in NS ....

Old habits. If it hit -30C here I think half the population would die in the first 24 hours.

 

[H4831]

"Bigger is better," wins every argument in the gun world. In reality it doesn't matter what primer you put in a cartridge. But how can you be against putting the most powerful, according to the advertising, primer in the case? A primer is more powerful, only if it has the largest flame for a the longest period of time. A magnum primer may meet this criteria, or it may not.
However, in the cold weather primer tests we did, it was shown that any rifle primer we used gave the same velocity to the bullet, within the range of normal tolerance, regardless which primer it was, what powder was used and what calibres were used.

 

[Longwalker]

I only use magnum primers with big cases like the .375H&H, and for some relatively slow powders like H4831 in 30-06. Never liked the idea of a magnum primer in small cases like the .308 and 7x57. But I generally agree with Bruce - H4831 above.. However I always use magnum primers with W296 ball powder in .357 mag and .44 mag. W296 ( and H110) has reputation of being difficult to ignite.

 

[Ganderite]

Use the mag primers and develop your load as per usual. can't hurt. Might help.

I say "might" because if you use a light bullet and ball powder it may be the only way to get the ammo to work.

 

[Grawfr]

I only use magnum primers to date, even in 9mm.

 

[Budweiser2]

I"ve used magnum primers in all my rifles , since I started loading.

 

[BCBRAD]

For hunting rounds I use a CCI-250 for everything,'06 sized case and up.

For targets its all about cup thickness and low ES, generally find a 'soft' primer (less powerful) is better in the search for low ES and to that end use standard Federal match primers to light of ~80grs of H-1000 in a 300WM with excellent results ....at least down to -10C.

Build your load around the primer and you won't have any trouble.

 

[nw mb]

...any more i put together reloads in both regular and mag

...there are differences depending on case capacity and powders especially

...how accurate is accurate to you?

 

[petemi]

I'm in Michigan. A while back, during "The Great Obama Ammunition and Component Shortage" a buddy collared a thousand Large Magnum Rifle Primers. He called and asked if I wanted them. They now reside in just about everything I shoot from a rifle...including .445 Super Magnum from a re-chambered .44 mag Handi Rifle. The only difference I see is perhaps improved accuracy in some rifles. My .243 Handi Superlight shot 18 consecutive rounds into 2.5 inches at 300 yards. My Handi .30-30 re-chambered to .30-40 Krag shoots cloverleafs at 200 yards if I do my part. Oh yeah, I'm a Handiholic. I have 22 of them.

Pete