480r primer question

[harley]

I am new to reloading on my own. Have done it a bunch with dad but trying to do it without his help. Recently bought a Super Redhawk 7.5 in 480R. Picked up some Cast Performance 375gr lfngc and h110. Guy gave me magnum large pistol primers. Looking up load data I am not finding mush needing the magnum primers. Most say large pistol primer. Does it hurt to use magnum if I don't need them?

 

[427mach1]

I believe H110 should be used with magnum primers. Check a few more reloading manuals to be sure. I looked on Hodgdon's website and they used Winchester Large Pistol primers but I don't they don't make large magnum pistol primers; they claim their regular large pistol primers are good for powders requiring magnum primers.

 

[harley]

I read something saying the Winchesters are good for both too. I have CCI 350 Magnum primers. Just don't want to make any mistakes.

 

[98Redline]

Generally H110 or W296 (same powder) requires a magnum primer. It is slow burning and hard to light. This is especially true in a big case like a 480R.

Both CCI 350s and WLPs will work just fine.

Just remember, H110 is a full boogie magnum powder. It should not be downloaded below published minimum charge weights. Even then, the spread between min and max is pretty small. That being said, I have found H110 to be a superbly accurate powder but you need to get darn close to the max charge before is really starts to shine. That means lots of noise and plenty of recoil.

Just start low and work up.

You are going to love your 480! Mine is out and out a tack driver.

 

[427mach1]

I agree with 98. 110 / 296 should not be loaded down. 296 is one of my favorite powders for heavy loads in my 41 mag; lots of bang and flash.

 

[Charlie U.]

As you have noticed most load data for the 480 does not call for magnum primers. My powder of choice for the 480 is W-296.

I have used Winchester and CCI primers. Currently I am using Federal 150 primers. All of these non-magnum primers have performed perfectly and never left me feeling that my ammo was not up to snuff.

 

[98Redline]

The issue with using standard primers with H110 and W296 is not that you can't set it off. In most every case you probably will, however there are two things to be concerned about.

1) Standard primers with this powder show consistently lower velocities and more importantly a higher standard deviation than their comparative magnum primers. A high SD generally means that you are operating in a pressure area where your powder is not burning efficiently or evenly.

2) It is when the weather gets cold that you need to be more concerned about not actually getting ignition. While the powders are not terribly temperature sensitive they do vary somewhat. By going with a standard primer you are starting to hedge into that gray area where you may get ignition and a complete burn or you may not.

 

[Jimbo357mag]

The rule of thumb is if you are substituting a magnum primer for a standard primer in a published recipe you should expect a slight increase in pressure and adjust accordingly. If you are loading near Max pressure be careful. If you are loading at a reduced pressure you are probably more than safe. In most instances substituting one for the other will make no difference at all.

 

[Divernhunter]

Use mag primers with H-110. I also use mag primers with every other load. I have done so for many years with no problems. There was an article, in Handloader Mag I believe, where they compared mag and reg primers in a few different pistol cartridges/guns and the results were better accuracy with mag primers even with loads commonly using reg primers.