Speaking of excellent graphics I think we should have held out for 54-40 or fight with the British. That way when Alaskan cruise ships dock in Vancouver we wouldn't need our passports. (bazinga)
For you Americans who don't get it DrMike lives in British Columbia Canada.
All reloading data in nothing more than "ball park" figures, this is because no two firearms are the same and the components used in reloading vary. If you look in the Lyman manual you will see pressure figures taken with a universal receiver and pressure test barrel. This means the chamber and...
MAinAR
Your the one pulling the handle of your reloading press and if your happy with your results that is all that matters. I can also tell you not all cartridge cases are made the same and vary in hardness. You have two choices, find a brand of brass harder in the base or not load so hot and...
The method I use above is used for my AR15 rifles, a over gassed AR15 still has pressure in the barrel as the bolt starts moving to the rear. If the primer pocket is loose this pressure can pop out of the primer pocket where it can fall into the trigger group and jam the rifle.
On a bolt action...
You can measure your primers and look at the charts below and order several pin gauges to fit your needs.
Vermont Gage Steel No-Go Plug Gage, Tolerance Class ZZ (Inch)
http://www.amazon.com/Vermont-Gage-Stee ... rmont+Gage
This method does not make the primer pocket "smaller" all it is doing is crimping the mouth of the primer pocket. Meaning the primer pocket is still oversized except for the mouth of the primer pocket.
One of the over pressure signs is to measure the base of the case just above the extractor...