Originally Posted by Sam_H
Originally Posted by gnoahhh
...be damned careful messing with reduced loads in larger capacity cases with slow burning powders. You won't be the first guy to wreck a gun with that trick.

I thought that was a surplus data powder burn rate (and slower) thing?

Also, am not chasing the 60% H4895 floor. More like at or just below recommended starting charges. In my .300s looking for 2800 fps with 180s, 2400 fps for the other two mentioned.
Not necessarily. IIRC the theory is that in a case that is only half full, instead of the slow burning powder burning from the flash hole forward, the primer flame shoots over the powder charge and ignites it all at once, causing tremendous pressure.

I am continually astounded at how quickly people make up their minds on little evidence or none at all.
Jack O'Connor