Standard or Magnum primers?
 

When loading the 300 Win Mag and the 300 Rem SAUM, should I use the magnum or standard primer? What are the advantages of using magnum and what are the cons of using standard?

RE: Standard or Magnum primers?
 

I would use the Magnum primers. The mag primers will give you a more consistant ignition when using large amounts of slow burning extruded powder in magnum cartridges.

Rem. 222

[Deleted]
 

[Deleted by Admins]

RE: Standard or Magnum primers?
 

Thanks for the replies. Will changing to magnum primers increase speed, change point of impact or have any other effects?

[Deleted]
 

[Deleted by Admins]

[Deleted]
 

[Deleted by Admins]

[Deleted]
 

[Deleted by Admins]

RE: Standard or Magnum primers?
 

You should always follow the directions of your loading manual.....I can't believe that there's a loading manual anywhere that recommends a standard rifle primer in a .300 Win Mag case!!!

RE: Standard or Magnum primers?
 

I was just looking at the Hodgons reloading manual #25 edition
every magnum 7mm through 460 weatherby (PRIMER SIZE) LARGE RIFLE
(quotes)Some powders need mag primers but doesn't say which ones.

RE: Standard or Magnum primers?
 

Hunter40, I have the Hodgdon's #26 manual......and it says "large rifle primer" for the .300 Mag and others as well!!!

From personal experience, there's little difference between Large rifle and magnum primers!!!

RE: Standard or Magnum primers?
 

in my of so limited expireience and knowledge i think i have come across some info which said magnum primers do burn a little hotter but are also a little stiffer so that cratering and getting holes punched thru the primer is a less common expierience. though i doubt it really matters all that much.

propmahn
save the world, reload your brass

RE: Standard or Magnum primers?
 

Thanks for all your replies. And Vapodog, I was referring to "large rifle primer" when I stated standard...and my lyman manual does specify large rifle. My other manuals say to use magnum primers. I do sometimes get flattened primers from a "non magnum" primer when using near max loads..but I see no other signs of excessive pressure, even when having loaded a case 8 to 10 times.

[Deleted]
 

[Deleted by Admins]