This thought came to mind with regard to your overcharge issue. I am shooting a 69 grain Lapua (223 Rem) in a bolt gun. My best charge of Varget fills the case so full, I can't seat the bullet off the lands without over compressing the powder. IOW, I can't get the bullet to seat consistently at .010 off due to powder being compressed.
If you can switch to a powder that fills your case to near 100 percent at the desired load, an overcharge will be immediately obvious.
Not sure thats possible with a gas gun, but maybe there is a powder that gives both accuracy and a level of safety. Of course, weighing each load is also a solution, albeit perhaps a bit too time consuming.
If you can switch to a powder that fills your case to near 100 percent at the desired load, an overcharge will be immediately obvious.
Not sure thats possible with a gas gun, but maybe there is a powder that gives both accuracy and a level of safety. Of course, weighing each load is also a solution, albeit perhaps a bit too time consuming.