500SW Primers - Magnum or not....

[mcapo]

Getting ready to start loading 500SW for the first time. With all the caveats around safe practices when developing a load, I am looking at the initial load to be Starline “R” Brass, 350 gr Berrys (round shoulder/jacketed) with ~40 grains of H110 over….well...that is my question.

I have Winchester Large Rifle Primers but not Magnums.

Given the supply issues with WLRMP, what are your experiences with magnum versus non-magnum primers in a similar 500SW load/H110/350 grs? The gun is a 4” model so we don’t have a lot of barrel length...

In some other caliber applications (but most definitely not all), I would say the non-magnum primers would be fine. The internet tends to agree for 500SW except for when it doesn’t. Lol

...or who in NEI whats to sell some WLRMP. ;-)

 

[Creedmoor]

Getting ready to start loading 500SW for the first time. With all the caveats around safe practices when developing a load, I am looking at the initial load to be Starline “R” Brass, 350 gr Berrys (round shoulder/jacketed) with ~40 grains of H110 over….well...that is my question.

I have Winchester Large Rifle Primers but not Magnums.

Given the supply issues with WLRMP, what are your experiences with magnum versus non-magnum primers in a similar 500SW load/H110/350 grs? The gun is a 4” model so we don’t have a lot of barrel length...

In some other caliber applications (but most definitely not all), I would say the non-magnum primers would be fine. The internet tends to agree for 500SW except for when it doesn’t. Lol

...or who in NEI whats to sell some WLRMP. ;-)

I don't believe you will have a problem.
I only use M primers in large magnum rifle cases. Your torching off what 40 grains, I dont see it being a problem.

The Internet, Yea.
Growing up my grand father and father bought two kinds of primers, large and small.

 

[Michigan Slim]

I seldom use mag primers for anything. I like Winchester over all others.

 

[two70]

I probably have some extra WLRM if you ever make it to central Indiana. That said, I've only used magnum primers for .416 Rigby and a load several rifle cartridges with typical powder charges well over 40 grains.

 

[Robert Richardson]

I've always used magnum primers with H110.

 

[mark40sw]

Always used large rifle (non magnum) primers with no issue. I have used up to 50 gr of H110 with 300gr FTX. Hornady manual also specifies non magnum large rifle primers.

 

[mcapo]

Thanks for the input. I think I will start with non-magnum primers and just wait until some magnums become available.

 

[DadSmith]

I've always used magnum primers with H110.

This is interesting.
Next time I load 44mag I'm going to load up 12 with lpp and magnum lpp and see if it makes any difference.
I'm thinking it won't, but need to test it to find out.

 

[mcapo]

This is interesting.
Next time I load 44mag I'm going to load up 12 with lpp and magnum lpp and see if it makes any difference.
I'm thinking it won't, but need to test it to find out.

Let us know results!

 

[DadSmith]

Let us know results!

Will do. Might be awhile I'm loading other cartridges right now.
I'll post here if I can find this thread later on.

 

[Creedmoor]

This is interesting.
Next time I load 44mag I'm going to load up 12 with lpp and magnum lpp and see if it makes any difference.
I'm thinking it won't, but need to test it to find out.

I use mag primers with H110 / 296, I believe you will have some cold weather ignition problems without them.

 

[DadSmith]

I use mag primers with H110 / 296, I believe you will have some cold weather ignition problems without them.

I'll give it a test when it's below 30.
Thanks for the information. It will help in my testing.

 

[Firehawk]

Getting ready to start loading 500SW for the first time. With all the caveats around safe practices when developing a load, I am looking at the initial load to be Starline “R” Brass, 350 gr Berrys (round shoulder/jacketed) with ~40 grains of H110 over….well...that is my question.

I have Winchester Large Rifle Primers but not Magnums.

Given the supply issues with WLRMP, what are your experiences with magnum versus non-magnum primers in a similar 500SW load/H110/350 grs? The gun is a 4” model so we don’t have a lot of barrel length...

In some other caliber applications (but most definitely not all), I would say the non-magnum primers would be fine. The internet tends to agree for 500SW except for when it doesn’t. Lol

...or who in NEI whats to sell some WLRMP. ;-)

Hey Mcapo, I just saw this post. I have 350 CCI No. 250 Large Rifle Magnum primers that I don’t need. And I was just up in Wabash last weekend We’ll probably be back up in a few weeks. If you still need some then I’d be happy to let you have them or trade for SRP.

Edit: unless you’re exclusively “Winchester” then never mind.