Magnum Primers

[v65magnafan]

I have "inherited" a few boxes of CCM Magnum primers.

I load .38 Special, .357 Magnum and .40 S&W--all range loads, definitely not hot. But, for fun, I plan to make some hot .357 loads.

I use Titegroup and mostly truncated and semi-wads.

I know that CCM says that the Magnum primers should be used in the .357 Magnum and also in temperatures below 20F.

I know that they are a hotter and slower burning.

I also know that lawyers rather than ammo engineers write the warnings.

So, what can I expect if I use the Magnum primers?

For example, will I notice any difference if I use them in .40 S&W's?


Thanks.

 

[ReloaderFred]

The use of magnum primers will (or may) raise pressures, so I would only use them in the .357 magnum loadings. The .40 S&W is already a high pressure round and I don't think I would use the magnum primers to ignite the small amount of powder in it.

I currently use magnum primers in all my magnum pistol rounds, but I load them to their full potential and the magnum primer helps to fully ignite the powder, which tends to be on the slow side of the burn rate chart for handguns.

Hope this helps.

Fred

 

[v65magnafan]

Sounds Good To Me

Thanks Fred.

I will reserve my stash of Magnum primers for those times when I want to take my 686-3 some real exercise.

 

[shooting on a shoestring]

Use your mag primers for ball powders

Use magnum primers for ball powders such as HP38, HS6, Lil'Gun, H110, AA#7 etc... The ball powders are harder to light, even with light loads. Mag primers will give you more consistency in velocity with those powders. Also if you are using load densities of say 75% or greater with slow powders like H4227, The exception is with 2400. Use only standard primers with it.

 

[45crittergitter]

Use them only in loads recommended with them in a currently published loading manual.

I've never heard of CCM. Could they be CCI?

 

[v65magnafan]

CCI

Yes, CCI.

I got confused with an old brand of bicycle.

Duh.