Originally Posted by jmason
I was using a load I worked up over the winter until about a week ago when it started getting 80+ around here. I was getting pressure signs so I started putting my ammo in a cooler and that worked ok. I wanted to work up a new load in this heat so I did, but what I found was my gun will not tolerate any loads within about a grain of book listed or QL max. Shooting some 130 grain BTs over H4831SC and maxing out around 2950 with my 26" factory tube.
Would this be normal or should I be looking for something else causing pressure?
What calibre ?
How close to the lands are you ?
And one other thing, check the trim length and look at the case mouth of a fired case
to see if it looks crimped.(You can take a loaded round and see if the bullet will go in
the fired case easy), Some times a rifle can be chambered with a short neck and it doesn't
want to release the bullet.
H 4831 sc is an extreme powder and is not known to be sensitive to temperature changes
Just a few thoughts on your problem.
J E CUSTOM