Originally Posted by KDB
Thanks for the reply. So, if headspace specs is application specific, what is head clearance and how does get determined?
While I certainly appreciate Mr. Lampert's kind remarks I'm afraid now I'm going to sound anything but smart. I don't know what head clearance means. I've never heard that one.
If your referring to bolt/breech face then again I base that on the application. A "bench queen" runs tighter (because most customers will have a brain seizure/fit if it's not done that way) where's a working gun gets loosened up so that it'll function in a broader range of conditions.
I'm going to go out on a bit of limb here to try and put some of this into perspective. Let me preface this by plainly stating that IF YOU DON'T KNOW/UNDERSTAND WHAT YOUR DOING STOP IMMEDIATELY AND SEEK THE COUNSEL/GUIDANCE OF AN EXPERT.
There, hopefully that'll thwart the "sea lawyers" out there.
The truth is if a guy was to build a rifle in his basement and screw up the headspace by .005, .010, .015" etc, it's still not quite as big a deal as it's often made out to be. SO LONG as a competent handloader, who understands how to compensate for it, does the handloading work.
You seat that bullet a mile long so that you know beyond the shadow of a doubt that the case head is firmly seated against the bolt face and you fire form the brass. This is nothing more than wildcatting 101. That's all your really doing. If our hypothetical homegrown gunplumber puts the kabosh on a 308 Winchester by gauging it with a NO/GO during chambering by mistake it is not a cardinal sin for him to use that gun. All he's done is create a ".308 Brainfart Improved" and now he has a little extra work to do when loading that first batch of ammunition.
If the shoulder is allowed to blow out to the chamber shoulder nothing really gets upset or hurt because of it.
HERE IS THE PROBLEM:
If this rifle were built for or sold to another person who isn't as careful or who lacks the experience to know what is truly going on then the person who built the rifles is very foolish/reckless and they deserve everything the attorney(s) are going to unleash on him. The reason being is if this poor bastard were to start running factory loaded ammunition through this fuggered/hybrid chamber then it is quite possible/likely going to "sneeze" a cartridge case and send someone to the ER. Ignorance is not bliss when facing the laws of physics.