Thread: Mae 6-30 ST advice needed

Its up to you , I have used 5/8 x24 , 18x1, & 18x1.5mm , depends on you , just use what suits the barrel dia , remember you want a reasonable shoulder/thickness left after threading , this more than anythng else will determine the size for you, 5/8 is good on varmint types , and the others for target /thicker barrels etc .
The 5/8 is a std USA thread , the 18x1 is the std Sako thread & the 18x1.5mm is Accuracy Internationals .

Later Chris