[gundog]

What are you guys building that might explode? Well designed weapons have built in safety features. Headspace gauges allow you check if you’re within those safe tolerances.

[entropy12]

I was trying to be funny. I guess I will keep my day job.

[marktwain]

I was making electrically fired muzzleloading, multi-shot pistols, as a proof of principle.

It was decades before former P.M. Abe was assassinated...

[Myrddin]

Headspace gauges allow you check if you’re within those safe tolerances.

Yup. I have a set of headspace gauges for each AR-15 caliber. I've found that it helps to purchase the barrel and bolt from the same source. I tried mixing Bear Creek Arsenal and Anderson parts and had a failure on the headspace check. I ordered a replacement bolt from the barrel supplier. Voila! A good fit. The other tweak is getting the buffer weight correct for the cartridge. Sometimes an adjustable gas block helps dial-in the cycling. My 6.5 Grendel build had barrel, BCG, adjustable gas block from the same supplier. A perfect fit, perfect cycling and accurate. Topped with a Burris scope with a factory table to match the scope setup to the Wolf 100gr ammo.