[Squantos]

MaDuce headspace..... when in doubt all the way in and two and a half out. Guess I was lucky in my career as I only saw a headspace gauge at the range.

[Chainmail]

I still have my headspace and timing gauge! Once I got to use the .50 for a living, I never let that thing leave my custody..

Now, of course I haven't touched a .50 in years, but you never know...