Magnum or standard primers.

[WildBillG]

Not sure if this has been asked before. What is the point at which some one should switch from standard to magnum primers. Does it go by charge weight,burn rate of the powder or temp most shooting will be done. Part of the reason I am asking is I am working up a load for my 280 Rem. I am using slow powders in the burn rate of Rl 25 to push the 168 VLD Hunting bullet. These powders max around 60 grains of powder give or take. I started load work up with the Fed 210M primers but I am wondering if the 215 might be a better choice. Seeking the help of the experts here.

 

[Dmagna]

I use a magnum in my 280ai. But I am using over 62 grains of n565 and it will be cold when I hunt with it.

 

[Jed Cooper]

I heard once(source unsure)that anything over 60grs go with a mag primer, but I'm sure there are too many variables. If cold weather shooting or hunting you could try both primers after soaking the ammo in a fridge for a few hours, then chrono and punch some paper to see the results.

Hornady says std primer even with IMR7828, but YMMV

 

[cape cove]

I use a mag primer when using ball powders regardless the case size or when the capacity gets to 55grs of powder or more. Not saying that at 55 I just switch, but if problems surface concerning ignition I will switch to a mag primer, and try several brands. JME

 

[asd9055]

If I am using loading manuals for guide, I use the recommendation. The vast majority of the times, Mag Calibers ask for Mag Primers.

I have two loads in 300 WBY that I use large rifle primers, but that is how those were developed. One accidentally by me and one intentionally by a gunsmith.

In the rare case that you would use cast bullets in a mag rifle, it is recommended not to use mag primers

In handguns, such as the 44 Rem Mag, when using light loads for fun, I use Large Pistol. For hunting, I use Large Pistol Magnum.

 

[Plinker147]

Call me crazy but I use mag primers in mags cartridges and standard in standard cases Seems to work. I do think around 60-65 grains is and the time to switch

 

[Hespco]

Try both primers with the powder you wish to use. Watch your pressures. A chronograph really helps. The powder burning rate & air temp need to be considered. Hunting in extreme cold is where a mag primer helps ignite the powder. Generally some where around the burning rate of IMR 7828 is a point to start considering a mag primer. Start slow & work up.

 

[asd9055]

One last thing, if you have a load that was developed for Standard Primer, and want to test for Magnum, back the powder down first and work up.

 

[Jud96]

I would go to a magnum if loading over 60 grains. Using a magnum with less powder won't hurt anything, but using a standard primer in a magnum can cause poor and inconsistent ignition.

 

[338 dude]

Not sure if this has been asked before. What is the point at which some one should switch from standard to magnum primers. Does it go by charge weight,burn rate of the powder or temp most shooting will be done. Part of the reason I am asking is I am working up a load for my 280 Rem. I am using slow powders in the burn rate of Rl 25 to push the 168 VLD Hunting bullet. These powders max around 60 grains of powder give or take. I started load work up with the Fed 210M primers but I am wondering if the 215 might be a better choice. Seeking the help of the experts here.

I don't know where I've heard it but the rule of thumb is 60 grains and above of powder would require a magnum primer

 

[jimbires]

what I've read , or learned over the years . mag primers if you are ; over 60 grains of powder , cold temps , compressed loads , ball powders .

if you're using a standard primer and notice a hangfire , chances are you need a mag primer .

 

[243winxb]

Mysteries And Misconceptions Of The All-Important Primer

 

[MagnumManiac]

Funny thing...I let my groups tell me which primer the load likes.
I test both magnum and standard primers, no matter the charge weight.
Both my 17 Rem & 222 Rem use magnum primers with certain powders, such as 748.
My 25-06 uses magnum primers for all loads but 1...and so on and so forth.
My 338WM shoots the 215gr Sierra Gameking best with a BR4 primer.

Cheers.

 

[Highlander44]

Not sure if this has been asked before. What is the point at which some one should switch from standard to magnum primers. Does it go by charge weight,burn rate of the powder or temp most shooting will be done. Part of the reason I am asking is I am working up a load for my 280 Rem. I am using slow powders in the burn rate of Rl 25 to push the 168 VLD Hunting bullet. These powders max around 60 grains of powder give or take. I started load work up with the Fed 210M primers but I am wondering if the 215 might be a better choice. Seeking the help of the experts here.

Hi,
I experimented a bit with Magnum primers with my .280 AI. Using H4831SC. The velocity increased slightly through the Magnetospeed, but the ES increased significantly, so I aborted testing. Rather have low ES & SD's than a few extra FPS