CCI 450 height

[goneshooting]

Has anyone actually measured the height of the CCI 450 primer? Their chart says .113 but I get .1195 on 3 calibrated micrometer.

 

[ShtrRdy]

Are you measuring just the cup or the cup plus anvil?

 

[goneshooting]

Cup + anvil
Just placing in micrometer and getting measurement.
I'm trying to dial in primer seating depth/crush. I want to start at just touching bottom of primer pocket (which i have the primer pocket depth) and test going deeper/more crush. Yes I can just test primer seating depth but I would like to know crush.
Thx

 

[sdbob]

Yes, I went with 0.12

 

[Straightshooter1]

Has anyone actually measured the height of the CCI 450 primer? Their chart says .113 but I get .1195 on 3 calibrated micrometer.

I use my Mitutoyo caliper, and when I measured them I get .120 to .121. I would call your .1195 good for comparing my .120's.

My Alpha brass pocket depths are at .122 and since I like ~.003 of crush I'll set my tool to seat them to .005 below flush and I find it's ok for the taller primers to get a little more crush.

 

[goneshooting]

Who cares ???

If you have to ask.....

 

[goneshooting]

I use my Mitutoyo caliper, and when I measured them I get .120 to .121. I would call your .1195 good for comparing my .120's.

My Alpha brass pocket depths are at .122 and since I like ~.003 of crush I'll set my tool to seat them to .005 below flush and I find it's ok for the taller primers to get a little more crush.

Thx, that's exactly where I'm headed.

 

[Conaso]

Has anyone actually measured the height of the CCI 450 primer? Their chart says .113 but I get .1195 on 3 calibrated micrometer.

On the chart I found the .113" is CUP height and .122" is "primer height". On the same chart #400 and BR4 indicates .120", and that is what you guys measured, I'd go with .120".

 

[Straightshooter1]

On the chart I found the .113" is CUP height and .122" is "primer height". On the same chart #400 and BR4 indicates .120", and that is what you guys measured, I'd go with .120".

Hmmm??? You're right about the .113" for cup height, but the chart I'm looking at shows .109" for the BR4's and 400's.

Maybe you did what I too often do . . . your hands type something other that what you were thinking?

 

[dellet]

I’m not sure what “chart” everyone is referring to, but I think it was a private survey of just cups measured. That should be verified as source and process. For what it’s worth here are SAAMI Specs.

 

[Straightshooter1]

I’m not sure what “chart” everyone is referring to, but I think it was a private survey of just cups measured. That should be verified as source and process. For what it’s worth here are SAAMI Specs.

View attachment 1720083

This one:

 

[dellet]

This one:

View attachment 1720084

Exactly James Calhoon

Primers And Pressure

 

[goneshooting]

It appears to me that the metal cup is .113 but the anvil actually sticks up above cup level so when I measure the primer, I get the .1195 (.120). When measuring crush, it makes sense to use the .120.

 

[divingin]

Hmmm??? You're right about the .113" for cup height, but the chart I'm looking at shows .109" for the BR4's and 400's.

How can overall height be less than the cup height? Or am I misunderstanding your post?

 

[Straightshooter1]

How can overall height be less than the cup height? Or am I misunderstanding your post?

Both the numbers are cup heights, not overall heights. Different primers, different cup heights.

So yeah, it appears you're just misunderstanding.