how do you check / set the headspace? What is the load / bullet combo you are using? (if you dont mind telling me)
No problem. I used the the sierra reloading manual and use 43.5 grains of varget with 168 grain sierra match kings. To check headspacing you can buy an rcbs precision mic, or what I did is just load three rounds at one c.o.a.l. measurement, then another three at a different coal, and so on. Then just go with the grouping that grouped tightest. I found I had the best results at 2.750; the sierra manual suggets 2.800 and most match ammo I have measured is 2.800. The further over 2.800 I went, the more my groups opened up.