Hi everyone,
so far, I have used N160 for my 284 Win with Lapua cases and Lapua 180 grs Scenar-L bullets. Now, I have tried to calculate two loads with new RS 70/76 powders using GRT and previously measured the water capacity of my fired cases. I am surprised by the results:
The slower RS 76 powder is burning faster?
Somehow, nothing really makes sense:
The fired case size don’t fit to CIP specifications. I have measured P1 12.17 mm and P2 12.72 mm for the fired Lapua cases. This is significantly more than what the case should have according to CIP, especially at the shoulder. Also, the case volume with 68.60 grs H2O is significantly larger than what is noted in the GRT database.
Actually, it looks more like a 284 Shehane! Can you draw any conclusions from the data?
Thank you
Uwe