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Rifles, Reloading, Optics, Equipment
Gunsmithing
Headspacing: Is GO gauge supposed to equate to never-fired brass?
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<blockquote data-quote="Max Heat" data-source="post: 631650" data-attributes="member: 43153"><p>OK, new brass is undersized then. I don't want to spend on a rem mag gauge at this point because I plan on re-barreling soon anyways, and also chambering-up to RUM, while I'm at it. So I don't see the sense in also spending on a gauge for a barrel/chamber that I will be ditching soon. I was just curious if the over-charged load took it out of spec. On that shot, the chrony showed 3875fps on a Nosler 120 BT, and the bolt was definitely tight coming up (powder was RL19). Assuming a linear relationship between charge weight and energy produced in the fired round, my estimate on what the charge weight had to be in that round puts it at about 83 grains, a 9.5 grain or a 13% over-charge! I'm not really sure how it happened.</p><p></p><p>I guess it really doesn't matter if that one took the rifle's headspace out of spec, since the barrel is slated to be swapped out to the RUM barrel in about a month or so, anyways. I'll just play it safe and not fire it any more until then. But what REALLY scares me now, is that the RUM setup that I will be switching to may not be so forgiving of a mistake of that magnitude.</p></blockquote><p></p>
[QUOTE="Max Heat, post: 631650, member: 43153"] OK, new brass is undersized then. I don't want to spend on a rem mag gauge at this point because I plan on re-barreling soon anyways, and also chambering-up to RUM, while I'm at it. So I don't see the sense in also spending on a gauge for a barrel/chamber that I will be ditching soon. I was just curious if the over-charged load took it out of spec. On that shot, the chrony showed 3875fps on a Nosler 120 BT, and the bolt was definitely tight coming up (powder was RL19). Assuming a linear relationship between charge weight and energy produced in the fired round, my estimate on what the charge weight had to be in that round puts it at about 83 grains, a 9.5 grain or a 13% over-charge! I'm not really sure how it happened. I guess it really doesn't matter if that one took the rifle's headspace out of spec, since the barrel is slated to be swapped out to the RUM barrel in about a month or so, anyways. I'll just play it safe and not fire it any more until then. But what REALLY scares me now, is that the RUM setup that I will be switching to may not be so forgiving of a mistake of that magnitude. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Gunsmithing
Headspacing: Is GO gauge supposed to equate to never-fired brass?
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