Thread: How hot?

looks similar to mine and they arnt hot loads either.Winchester mod 70 action 260ai 6 to 7 firing.

Originally Posted by Neckshot

looks similar to mine and they arnt hot loads either.Winchester mod 70 action 260ai 6 to 7 firing.
Attachment 12702

Where is the RE off the REM gone

Neckshot, the head stamp is partially gone and the loads are not hot? You sure about that? Lapua brass to.

Originally Posted by Neckshot

looks similar to mine and they arnt hot loads either.Winchester mod 70 action 260ai 6 to 7 firing.
Attachment 12702

Loads not hot ??!!????

Dude, if that is what is happening to your brass your loads ARE way too hot. Lapua cases are generally harder/tougher than most other makes. (i.e. - good.)

Brass swell into the plunger ejector hole, then getting sheared off as you rotate the bolt face on the jammed case.

the primer 'cratering' is caused by the EXCESSIVE pressure pushing the firing pin tip back as the cartridge discharges, during peak pressure.

These are the main fixes for these conditions:

1. reduce your powder charge or neck tension, or take the bullet out of 'jam' condition.
2. Go to a custom action or bolt with a reduced diameter firing pin tip.
3. use primers with a harder 'cup'.
4. Increase the force of your bolts mainspring.
5. Norma brass is notoriously soft compared with other makes, reduce your loading intensity.
6. Go to a stiffer/bigger custom action that is better able to handle the higher pressures.
7. Reduce your loads. velocity for velocities sake is not always a good pursuit.
8. All of the above.


(9. ensure your medical/income protection insurance is paid up if you want to keep pushing the limits of a bit of brass that is the main think separating you from 60,000+ PSI of 'nasty'.........)