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Rifles, Reloading, Optics, Equipment
Gunsmithing
Scarring Across the Chamber Throat a Problem?
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<blockquote data-quote="Pdvdh" data-source="post: 2207484" data-attributes="member: 4191"><p>Looking for some feedback? Please take a look at these photos I took of the throat in a cut rifled barrel I just had chambered. The neck of the chamber is visible to the left, and the rifling visible at the right side in these two photos. So the pics are centered on the throat.</p><p></p><p>The score marks run the length of the throat longitudinally, extending from the groove back to the neck of the chamber. So even after the chamber reamer cut the throat, these score lines were deep enough to remain present across the throat. The scars are just showing off the end of one of the 6 grooves</p><p></p><p>I don't know if these score marks were left by the cutter when the grooves were cut into the bore, or from lapping. I'd guess from the cutter. Guessing the cutter cut this one groove deeper than the other 5 grooves. </p><p></p><p>I don't see these score marks in the throats on any other barrels in my collection. Would you contact the barrel manufacturer if this were your barrel? Or shoot it and throw the dang bore scope away? I know bore scopes reveal the minutia, but like I said, I've not seen this before. Anybody else seen this scoring after cutting the chamber/throat? Thanks...</p><p></p><p>[ATTACH=full]276779[/ATTACH][ATTACH=full]276778[/ATTACH]</p></blockquote><p></p>
[QUOTE="Pdvdh, post: 2207484, member: 4191"] Looking for some feedback? Please take a look at these photos I took of the throat in a cut rifled barrel I just had chambered. The neck of the chamber is visible to the left, and the rifling visible at the right side in these two photos. So the pics are centered on the throat. The score marks run the length of the throat longitudinally, extending from the groove back to the neck of the chamber. So even after the chamber reamer cut the throat, these score lines were deep enough to remain present across the throat. The scars are just showing off the end of one of the 6 grooves I don't know if these score marks were left by the cutter when the grooves were cut into the bore, or from lapping. I'd guess from the cutter. Guessing the cutter cut this one groove deeper than the other 5 grooves. I don't see these score marks in the throats on any other barrels in my collection. Would you contact the barrel manufacturer if this were your barrel? Or shoot it and throw the dang bore scope away? I know bore scopes reveal the minutia, but like I said, I've not seen this before. Anybody else seen this scoring after cutting the chamber/throat? Thanks... [ATTACH type="full" alt="WIN_20210528_15_28_32_Pro.jpg"]276779[/ATTACH][ATTACH type="full" alt="WIN_20210528_15_22_28_Pro.jpg"]276778[/ATTACH] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Gunsmithing
Scarring Across the Chamber Throat a Problem?
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