Thread: R26 and carbon

I’m working up a load for my new blaser mag using r26, 180eldm. I was finding pressure at a low charge of 65.5-66grn, someone mentioned a carbon ring, so out came the c4 and a good scrub. I settled on 65grns and started a seating depth test. After nine rounds I started to see some pressure, slight ejector wipe and more of a click on bolt. I carried on the last few rounds and had another clean, fark me the patches were blacker than black. Are people seeing this with r26,
Any other 7 blaser guys seeing this lower charge? 65grns is 2980fps