Norma 6 Dasher F CLASS brass fired in a Lapua Chamber?
- Thread starter baydawg
- Start date
That depends on the trim length of your chamber. Some Dashers have a long trim length. But if the brass is too long for your chamber and pinches the bullet, pressure will skyrocket. Get a Sinclair chamber guage and determine the actual length of your chamber. It fits in a case and you shut your bolt and then take it out and measure your actual chamber length. Matt
Well, i can tell you what happened....
New rifle and it was supposed to have been reamed with the f class reamer...it was not.
I loaded 500 of these and went and shot the midrange nationals at atterbury in july. The rifle shot great (99.54%) good enough for 5th any rifle.
I had a few popped and pierced primers but i just attributed it to the hot weather and semi-warm loads (33 gr varget).
I got home and started to investigate the brass and it shwed what looke like a “case head separation” line....but about .300 below the body shoulder junction. They also felt like a burr at the body shoulder junction.
I was pissed at the brass...then i started doing some investigation. I called the smith and it was determined that the lapua reamer was used.
So, it appears, that on a certain level the rifle was headspacing not on the shoulder. Therefore, upon firing, the shoulder was being stretched to the chamber.
In summary:
It shot lights out
I was basically fire forming
I ruined 500 pieces of brass
No one died
New rifle and it was supposed to have been reamed with the f class reamer...it was not.
I loaded 500 of these and went and shot the midrange nationals at atterbury in july. The rifle shot great (99.54%) good enough for 5th any rifle.
I had a few popped and pierced primers but i just attributed it to the hot weather and semi-warm loads (33 gr varget).
I got home and started to investigate the brass and it shwed what looke like a “case head separation” line....but about .300 below the body shoulder junction. They also felt like a burr at the body shoulder junction.
I was pissed at the brass...then i started doing some investigation. I called the smith and it was determined that the lapua reamer was used.
So, it appears, that on a certain level the rifle was headspacing not on the shoulder. Therefore, upon firing, the shoulder was being stretched to the chamber.
In summary:
It shot lights out
I was basically fire forming
I ruined 500 pieces of brass
No one died
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