A question about SRM primers.

Fullthrottle · March 2, 2014, 08:24 PM

Ok so first off I will state that I screwed up. I was looking for small rifle primers at my lgs the other day. Told the guy what I needed. I got home and today I realize that he gave me small rifle magnum primers.

The mistake I made was I assumed he gave me what I asked for(I should have looked closely at the box) That is my fault.

The LGS has a no return policy on ammo, primers, powder.

Here is the real question. I was intending these primers for 5.56 reloading, can I still do so?
In other words start low and work my way up on powder. Any of you folks do something dumb like this and just load accordingly?

I have been reloading since around 2008, so I am not new to reloading(and I am not asking for recipes) just thoughts as to is it reasonable to start at min reloading spec and just work up to a good/safe load?(I realize I will have to rework my load when I get non magnum primers).

I am used to following the manuals about reloading, that is why I ask, this is a bit outside the manual.

And for what its worth I went there to check powder. I finally picked up some more Varget!

Ifishsum · March 2, 2014, 11:51 PM

They will work fine, I regularly use magnum primers for .223/5.56. It sounds like you will be working up the load with them to begin with - the warnings about switching primers (and other components) is about changing primers on an existing load that has been tested, and assuming the same load is safe with the new components. If you work up your load with them to begin with then you're in good shape.

Fullthrottle · March 2, 2014, 11:58 PM

That is what I figured. Just was wondering if I was on the right track for that.

I had a question a month or two ago about doing the opposite Large rifle primers were available locally but I was wanting to use them in a 7mm Mag!

After reading the comments and understanding that the non mag primers may not light off that much powder, I decided against that(the large magnum rifle primers was the reason I was really in my LGS anyhow....but none to be had)!

steve4102 · March 3, 2014, 08:57 AM

You will be fine, just start low and work up. Many, many handloaders use Mag primers in their 223/5.56 ARs. The CCI #41 was designed for rifles like the AR, It is classified as a Mag Primer. I use Rem 7 1/2 primers in all my cartridges that take SR primers, it to is classified as a Mag primer.

March 2, 2014, 08:24 PM	#1
Fullthrottle Senior Member Join Date: October 24, 2009 Posts: 280	A question about SRM primers. Ok so first off I will state that I screwed up. I was looking for small rifle primers at my lgs the other day. Told the guy what I needed. I got home and today I realize that he gave me small rifle magnum primers. The mistake I made was I assumed he gave me what I asked for(I should have looked closely at the box) That is my fault. The LGS has a no return policy on ammo, primers, powder. Here is the real question. I was intending these primers for 5.56 reloading, can I still do so? In other words start low and work my way up on powder. Any of you folks do something dumb like this and just load accordingly? I have been reloading since around 2008, so I am not new to reloading(and I am not asking for recipes) just thoughts as to is it reasonable to start at min reloading spec and just work up to a good/safe load?(I realize I will have to rework my load when I get non magnum primers). I am used to following the manuals about reloading, that is why I ask, this is a bit outside the manual. And for what its worth I went there to check powder. I finally picked up some more Varget! __________________ When seconds count, why is help minutes away?

March 2, 2014, 11:58 PM	#3
Fullthrottle Senior Member Join Date: October 24, 2009 Posts: 280	That is what I figured. Just was wondering if I was on the right track for that. I had a question a month or two ago about doing the opposite Large rifle primers were available locally but I was wanting to use them in a 7mm Mag! After reading the comments and understanding that the non mag primers may not light off that much powder, I decided against that(the large magnum rifle primers was the reason I was really in my LGS anyhow....but none to be had)! __________________ When seconds count, why is help minutes away?

March 2, 2014, 11:51 PM	#2
Ifishsum Senior Member Join Date: September 15, 2005 Location: Oregon Posts: 1,033	They will work fine, I regularly use magnum primers for .223/5.56. It sounds like you will be working up the load with them to begin with - the warnings about switching primers (and other components) is about changing primers on an existing load that has been tested, and assuming the same load is safe with the new components. If you work up your load with them to begin with then you're in good shape.

March 3, 2014, 08:57 AM	#4
steve4102 Senior Member Join Date: December 23, 2005 Location: Minnesota Posts: 2,952	You will be fine, just start low and work up. Many, many handloaders use Mag primers in their 223/5.56 ARs. The CCI #41 was designed for rifles like the AR, It is classified as a Mag Primer. I use Rem 7 1/2 primers in all my cartridges that take SR primers, it to is classified as a Mag primer.