Mike Matteson
Well-Known Member
I change over 25 yrs ago to neck sizing my belted mag cases. It stop the case separation and lost of case in 3 to 4 firing. Now getting 10 to 12 firing from the case. These powder loads were about 5 grs over manual loading spec. I would lose them do to primer pockets getting to big. They say there a fix to that too now, and I will try that to see how it works. The other part of this is when I fire the cases I would use a neck sizing die and not completely size the neck. That created a kind of 2nd shoulder in the neck. It reduced the grouping size at the same time. The other item was I cut my necks for thickness and uniformity after full length sizing my case at the time. Head space off the shoulder not the belt. It's isn't that hard to setup. I am looking at gettng some of the peterson 300WM long cases. Which I am going to size down to 7mm RemMag chamber.
There has been alot of changes from that time going forward. I haven't been able to put new practises inplace just yet. Finally I am just about to complete my reloading shack in Montana. Got a long way into finishing it this time around.
It's hell to get old, and having to depend on others.
I have learned alot here, and adding to my reload practises. It will be interesting to see what works or doesn't make any differents.
There has been alot of changes from that time going forward. I haven't been able to put new practises inplace just yet. Finally I am just about to complete my reloading shack in Montana. Got a long way into finishing it this time around.
It's hell to get old, and having to depend on others.
I have learned alot here, and adding to my reload practises. It will be interesting to see what works or doesn't make any differents.
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