@Pommy thats super interesting. I had a feeling it must be overpressure for it to be doing what its doing. Interestingly i have just gone through the brass from the weekend, Faintest of swipe on the 48.5gr load, i just cleaned measured sized & re primed them & the primer pockets are still nice and tight. Worth noting in my last creedmoor which was a tikka aswell but with a different batch of lapua brass, i didnt get anywhere near this powder charge before seeing pressure, looking through my old notes just on 46.5gr was a stiff bolt & ejector swipe. Wonder if theres some variance in the strength of brass batch to batch making it harder to use the brass as a sign of being overpressure?
Bookmarks