66
Its supposed to bear on the link, its to stop the link turning out. I'm sure an Original anorak will come on to tell us the correct setting but when we had them new when God was a boy and on the ones we have now for our Junior team I just get a happy ballance between being too tight and keeping the link actuating, a smear of grease helps as well. If they are too loose you get a loud crack when the link goes over centre.
Good Shooting
Robin
Walther KK500 Alutec expert special - Barnard .223 "wilde" in a Walther KK500 Alutec stock, mmm...tasty!! - Keppeler 6 mmBR with Walther grip and wood! I may be a Walther-phile?