Took some reloads to the range to fire out of a new rem 7600 30-06. Noticed after firing, some brass would come out very hot while others came out cool to the touch. Any idea what would cause this?
I had some issues in my other 7600 with these loads. Some would not chamber easily while others loaded fine. I sorted them out so I only kept the rounds that chambered easily. Checked the loads with a headspace gauge and most looked pretty good. I've since ordered and received small base dies that I hope will fix the clambering issue. Not sure if it's related to the temperature of the brass I noticed.
I had the same problem with my 760. some brass would not chamber correctly I could never find what the problem was and sold the gun. I think the small base dies may help. you may be getting excessive pressure with the loads that are hot to the touch. check that brass for signs of excessive pressure.
Yes I am full length sizing every time. I trim the case length every time also. The brass is not all the same headstamp. Ill look into that.
I have received my small base dies. While I've only sized the brass with them, they all look perfect in a headspace gauge. Using these dies, the base comes out about .003" - .004" smaller. Hoping this will help with the chambering issue.
As far as excessive pressure, I don't think so. No crack or separation. The primer isn't flattened. There is a little "cratering" around the firing pin mark but both of my 7600s do this even with factory loads.
I'm wondering if on the hot rounds, perhaps the action didn't fully lock up and possibly unlocked a little faster than normal??
First off it is a good idea to use all brass with the same head stamp for the same load from as different head stamps can vary in capacity. Second I believe it has to do with the speed that the round leaves the chamber after firing, for example just look at the brass exiting a bolt rifle vs a semi auto. I cant remember ever picking up a hot case from a bolt gun but brass from a semi is always hot. Due to the nature of the pump gun I have had where it is bumped open immediately after firing which could be the cause as the action is opening quicker than a bolt gun.