Primer hardness

[barretcreek]

This could go several places so if Moderators deem it misplaced it's your call.

LGS where I occasionally worked got in a few bricks of CCI 41 mil-spec primers, so I grabbed one. I want to compare firing pin strikes to CCI 450s. Both on fired cases and unfired just cycled through the rifle by a previously fired cartridge. Only way I can figure out is if I can find a small enough needle tip for a dial indicator or a micrometer which measures in ten thousandths with something similar.

Anyone got a better idea?

[lyman]

nope, seems that would be the easiest way to measure,


a depth micrometer would work, if you wanted to modify it to fit the indentations,

[Roadkingtrax]

This is a good place to start. I believe both the 450 and #41 are equivalent, but only one designated primer carries the government qualification requirements.

https://www.accurateshooter.com/technical-articles/primers-and-pressure-analysis/

[barretcreek]

Thanks RKT. Guy on another site sent this.

https://www.sksboards.com/smf/index.php?topic=56422.0

Better to ask first before doing the research.

[one shot]

How much did you pay .

[barretcreek]

How much did you pay .

$90/k 34/41 have always been more. Regular primers are $60-75.

Actually the store called and said the cashier only charged me for one sleeve and would I mind paying the balance the next time I'm in.

[one shot]

what county are you in

[barretcreek]

what county are you in

Where are you? It's cold up here.

Actually the SKS board article makes me think a titanium firing pin might be a good idea.

[one shot]

yeah potter is cold this time of year

[togor]

Primer marks on an unfired case a good idea. The high pressure of a fired round may well cause all primers to look the same as they all form to available free space.

Another possibility is to fire primed empty cases and check for differences there.

[Former Cav]

look at the indention through a microscope and measure the diameter of the dimple. The harder the strike and deeper penetration, the bigger the diameter. Kind of like the way you measure for Rockwell hardness.