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Bullet94
Guest
Lately I’ve been reading about Headspace. I came across this quote on one of the threads here and I believe it is correct according to SAAMI (see below). I have a question in regards to Head Clearance of cartridges. In factory rifles with standard chambers what is the head clearance supposed to be? Does SAAMI or anyone set standards for this? How do they ammo companies arrive at a case size? I’m not asking how much to resize my cases just wanting to know how some of this works as far as set standards relating to Head Clearance and cartridges or cases.
Sorry if this is not posted in the correct place.
Sorry if this is not posted in the correct place.
headspace is a characteristic of a chamber( not a case, or ammunition). it is specified on the SAAMI chamber drawing( and not on the cartridge drawing). it is a hard number plus some small amount(0.010 or so). the difference between the chamber min and the cartridge max is called clearance. think about the bolt and the reciever.....by design there is some clearance to allow movement, but in benchrest it is very small.
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