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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Checking Headspace Question
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<blockquote data-quote="bigngreen" data-source="post: 1319232" data-attributes="member: 13632"><p>This has prompted a little more research, there is no SAAMI spec for a no go guage, the only specs are a min and Max which are .010 apart on the data sheet. Researching a little farther and found out different manufactures set there no go anywhere from .004 to 006 from the min spec. I have seen this in different manufactures and I have started only using one guage that matches the make of the reamers so the specs track all the way through the process. </p><p>I found a couple of highly regarded Smith's who set headspace to a slight drag on the no go and clean drop on go, this is in spec as the no go seems to just be a reference point. Also many Smith's set headspace to a lot of brass so your not firing out brass to match headspace, I know I've seen lots of WSM brass fire out over .004 when headspace at 0. Then again you have Smith's who set headspace to the dies, I have seen also, if you set a 28 Nosler 0 on a go guage a Redding die won't touch the shoulder, set it to a slip on the no go and your perfect and in SAAMI spec.</p><p>Personally I set my chambers .001-002 using brass shim stock but I've started giving them more room than trying to be right at 0 because at every point there is a tolerance and setting up too tight seems to cause more end user issues unless dies are also custom.</p></blockquote><p></p>
[QUOTE="bigngreen, post: 1319232, member: 13632"] This has prompted a little more research, there is no SAAMI spec for a no go guage, the only specs are a min and Max which are .010 apart on the data sheet. Researching a little farther and found out different manufactures set there no go anywhere from .004 to 006 from the min spec. I have seen this in different manufactures and I have started only using one guage that matches the make of the reamers so the specs track all the way through the process. I found a couple of highly regarded Smith's who set headspace to a slight drag on the no go and clean drop on go, this is in spec as the no go seems to just be a reference point. Also many Smith's set headspace to a lot of brass so your not firing out brass to match headspace, I know I've seen lots of WSM brass fire out over .004 when headspace at 0. Then again you have Smith's who set headspace to the dies, I have seen also, if you set a 28 Nosler 0 on a go guage a Redding die won't touch the shoulder, set it to a slip on the no go and your perfect and in SAAMI spec. Personally I set my chambers .001-002 using brass shim stock but I've started giving them more room than trying to be right at 0 because at every point there is a tolerance and setting up too tight seems to cause more end user issues unless dies are also custom. [/QUOTE]
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Checking Headspace Question
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