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I am shooting a 2 year old Savage 111 25-06 and made a batch of ammo as follows:
The length of the chamber is adjustable when the chamber is measured from the shoulder to the bolt face. When sizing a case the length of the case is adjustable from the shoulder to the case head. There is a maximum, a die and shell holder should not be able to size a case shorter than minimum length/full length sized. Problem, there are reloaders that grind the bottom of the die and or top of the shell holder.
I do not have these problems, if the rifle was my rifle and I had a problem with light primer strikes, blown ? primers and cratered primers I would start forming a 280 Remington case to 25/06. There is no way I could miss with the 280 Remington case, the shoulder is forward of the 25/06 by .051", I would start with .020" meaning I would add .020" to the length of the 25/06 case between the shoulder and case head. And no, I would not load the formed case, I would chamber it to determine if the bolt would close.
Next time, I would suggest you save a new, over the counter store bought round for comparison, If new factory over the counter ammo works, the next time you reload make your reloads look like the factory new over the counter ammo.
You could start saving your fired brass, I would suggest you learn to measure the length of the case from the datum/shoulder to the case head. When comparing the fired case length to the sized case length from the shoulder to the case head you will be able to determine the effect sizing is having on your cases.
F. Guffey