Blown primers

[carlread308]

Hi just wondering why im starting to blow primers, using cci 400 , didnt have the same problem with br4 primers , is my load to hot or just soft primers?

[Matt P]

What action ??

[carlread308]

Tikka223sporter

[Bigtravoz]

New cases of a different manufacturer? New powder batch? Seating further into lands? Any other information you can think of?

[KHGS]

Hi just wondering why im starting to blow primers, using cci 400 , didnt have the same problem with br4 primers , is my load to hot or just soft primers?

More info needed, Tikka model, pictures of "blown" primers, bullet weight, would all help!!!
Keith H.

[mike H]

Hi just wondering why im starting to blow primers, using cci 400 , didnt have the same problem with br4 primers , is my load to hot or just soft primers?

As far as I know,the Br4 primers have thicker metal in the body compared to the CCI 400’s,25 thousand of an inch to 20 thousand of an inch.To me,the term blow primers means primer pockets expanded in the cartridge case and primers falling out.Is this happening ? or are you getting blanked or pierced primers.

[6.5x55ai]

This info is pretty old now but I presume still accurate -
http://www.jamescalhoon.com/primers_and_pressure.php

[carlread308]

Pierced primers

[Wal86]

From your limited information, pierced primers are generally an indication that your loads are too hot/ or too hot for that particular primer...

[carlread308]

Thanks I'll go back to br4 primers