I agree with most of this info. Definately reduce the loads for the NATO brass. You MAY have issues with MG fired brass in a bolt gun, depending on the chamber dimensions of the MG, your sizer die and your chamber. A match tight chambered .308 like a Remmy PSS will not likely take ANY reload.Here click on this.
The 308 win runs at a slightly higher pressure than the 7.62 NATO round. The mil spec brass is thicker and you should reduce any load by 5%to 10%. You can and will get 762 brass that was fired in a MG if that happen you are SOL as this brass can't be fired in a regular bolt action gun. You can shoot 762 in a factory 308 chamber but if you have a rifle that is chambered for a 7.62NATO you can't fire 308 win in it. If you do you take a chance of hurting the rifle.
No one said if you do this it is going to blow up in your face on the 300th round.I shoot .308 Win in my M1A all the time. I've been doing so for 20 + years and it still holds less than 1" groups @ 100 yards. In semi-auto mode I limit my grain bullets to 175 grain. However, I turn the gas off, cycle the action manually and shoot 180 to 200 grain bullets all the time as well. I've seen no damage or excessive wear on this rifle by using .308 win. and the heavier weight grain bullets. Is this model rifle an exception to the 7.62X51 vs. .308 Win. rule?
Rem. 700P . . . used to be PSS, is a standard chamber. The whole reason people buy them is for match loading ammo -- "reloads."A match tight chambered .308 like a Remmy PSS will not likely take ANY reload.
There was something wrong with it then. Because if you were full length sizing it that should have been at the min case dimensions.I guess it depends on the rifle. I had a PSS that would not chamber anything reloaded. I tweaked and tinkered but that thing was tight.