1) Go out and buy head space gauges, make sure it checks out before you send any rounds down range.
or
2) Take caution with the first round, hide behind some buffer, keep you head and body parts away as you squeeze the first round off down range.
or
3) Trust that the rifle was tested and fired before it left the factory/gunsmith, so just go ahead and rest your cheek behind the closed bolt, open you eyes, aim and fire the first round with ease.
I am guessing this question applies to larger calibers like 338lm, 375/408CT and especially the 416 Barret/50BMG...
or
2) Take caution with the first round, hide behind some buffer, keep you head and body parts away as you squeeze the first round off down range.
or
3) Trust that the rifle was tested and fired before it left the factory/gunsmith, so just go ahead and rest your cheek behind the closed bolt, open you eyes, aim and fire the first round with ease.
I am guessing this question applies to larger calibers like 338lm, 375/408CT and especially the 416 Barret/50BMG...