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Rifles, Reloading, Optics, Equipment
Gunsmithing
belted magnum go / no go gauge
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<blockquote data-quote="DUSTY NOGGIN" data-source="post: 1361711" data-attributes="member: 89550"><p>there is not a specific cartridge like other go/no go gauges , reading about and found 7rm , 300wm & 338wm all same height</p><p></p><p>im working with a 7mm rem mag </p><p></p><p>saami cartridge drawings</p><p>.220 (-.008)</p><p>chamber drawings</p><p>.220 - .227</p><p></p><p>is there any benefit to keeping it tight in these tolerances (at .220 ) so when you expand your brass you actually get 2 headspacing points , one at belt and one at shoulder datum ?? i figure eventually all brass will match that anyway but would only really be headspacing on the shoulder</p><p></p><p>my reasoning would be the pin pushing idea , whether or not it happens i dont know , but if you could keep that headspace at the belt held tight as possible it would certainly fire form out the shoulder to match , on the first firing</p><p></p><p>is there really a difference in brass makes of .008 ??? to the belt</p></blockquote><p></p>
[QUOTE="DUSTY NOGGIN, post: 1361711, member: 89550"] there is not a specific cartridge like other go/no go gauges , reading about and found 7rm , 300wm & 338wm all same height im working with a 7mm rem mag saami cartridge drawings .220 (-.008) chamber drawings .220 - .227 is there any benefit to keeping it tight in these tolerances (at .220 ) so when you expand your brass you actually get 2 headspacing points , one at belt and one at shoulder datum ?? i figure eventually all brass will match that anyway but would only really be headspacing on the shoulder my reasoning would be the pin pushing idea , whether or not it happens i dont know , but if you could keep that headspace at the belt held tight as possible it would certainly fire form out the shoulder to match , on the first firing is there really a difference in brass makes of .008 ??? to the belt [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Gunsmithing
belted magnum go / no go gauge
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