Are Magnum Primers Needed with Compressed Charges in Non-Magnum Cartridges?

[South Pender]

I understand why we see recommendations for magnum primers with ball powders. The space between the kernels (spheres) is less than with stick powders, and a more forceful primer is needed to ignite the whole powder column.

However, consider loading a standard, non-magnum, cartridge like the 270 Win. or 6.5 x55 Swede and suppose you load a stick powder with compression (for example, a 105% capacity load) This compression will presumably reduce the inter-stick spaces. In this case, are magnum primers called for?

 

[C.E.Smith043]

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[Capt. Oblivious]

I fill a 30.06 case with N550 and set it of with standard Federal Match primers without any problems. If you have allot of magnums use them if you dont use standard primers

 

[std7mag]

I use Fed 210M primers in my 280 Rem.
I've run compressed loads (104%), and ball powders down to 18°f with no problems.

 

[HTSmith]

The short answer is no, but sometimes the magnums will give better accuracy.

 

[SKWERLZ]

No
I don’t even run magnum primers in my small magnum and am probably switching to reg primers in my bigger magnum

 

[bozo699]

No
I don’t even run magnum primers in my small magnum and am probably switching to reg primers in my bigger magnum

Why?….
Wayne

 

[SKWERLZ]

Why?….
Wayne

I definitely get a better ES in my short magnum and it’s looking like the same for my big magnum.

 

[centershot]

When I loaded standard in my .300 H & H, I could hear the firing pin fall before the round went off!

 

[JEFFPPC]

Maybe I have developed a fetish but in the .244, .243, and .280 that I use 4831SC in I find I get more consistent good accuracy with magnum primers but it might not show up depending on the base accuracy potential of the rifle being used.

 

[Shrek]

I definitely get a better ES in my short magnum and it’s looking like the same for my big magnum.

This has been my experience and switching to standard large rifle primers in my 6.5 SAUM also reduced flyers.

 

[Dgd6mm]

The saum and WSM cartridges were known to do well with non magnum primers years ago.

 

[jackieschmidt]

One of My favorite load in my 30/06 is 61 grns of 4831 SC with a 178 grn AMax, regular WINCHESTER Primers.

that is a compressed load.

 

[46and2]

I understand why we see recommendations for magnum primers with ball powders. The space between the kernels (spheres) is less than with stick powders, and a more forceful primer is needed to ignite the whole powder column.

However, consider loading a standard, non-magnum, cartridge like the 270 Win. or 6.5 x55 Swede and suppose you load a stick powder with compression (for example, a 105% capacity load) This compression will presumably reduce the inter-stick spaces. In this case, are magnum primers called for?

I personally believe the higher the load density the more uniform/efficient the combustion.

I would be more concerned about using standard primers with low load density.

I run BR2 primers in my 28 nosler with RL33 at about 100% case capacity. Tested at negative 5°F with no ignition delays.

 

[GetReal]

Im still tryin' to figger why 6 Dasher calls for CCI 450's.....

 

[SKWERLZ]

Im still tryin' to figger why 6 Dasher calls for CCI 450's.....

Because Remington 6 1/6 and Cci #400’s are designed for 22 hornet and similar low pressure cartridges.
Not the 60-65k common in many newer cartridges.

 

[SKWERLZ]

I personally believe the higher the load density the more uniform/efficient the combustion.

I would be more concerned about using standard primers with low load density.

I run BR2 primers in my 28 nosler with RL33 at about 100% case capacity. Tested at negative 5°F with no ignition delays.

I’m testing fed #210M’s with 95+ grains of N570 and it’s appearing that my 10 shot SD is going to be consistently in the 7’s instead of 9-10

 

[M-61]

When I loaded standard in my .300 H & H, I could hear the firing pin fall before the round went off!

Do you mean you heard the firing pin HIT the primer or you heard the pin travel?

 

[centershot]

Do you mean you heard the firing pin HIT the primer or you heard the pin travel?

I heard the click before the bang.

 

[nmkid]

I currently run CCI LRP in a .257 WBY without any problems and it shoots pretty darn good.