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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
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<blockquote data-quote="kweidner" data-source="post: 291148" data-attributes="member: 4964"><p>Hart makes a crown lapping tool you can use by hand. I have fixed many a friends truck gun with that thing. Check this link <a href="http://www.midwayusa.com/viewproduct/?productnumber=913296" target="_blank">MidwayUSA - R W Hart Barrel Muzzle Crown Lapping Tool Complete Set with 4 Inserts for 22 to 35 Caliber</a> As a matter of fact my gunsmith borrows it from me quite regularly. To answer your question a tiny nick causes an irregular gas release at the muzzle. The most important area to be sure. The bullet needs to leave the bbl the same way every time for consistent groups. One tiny nick will wreak havoc on group size. This tool beats taking the bbl off and turning a new crown.</p></blockquote><p></p>
[QUOTE="kweidner, post: 291148, member: 4964"] Hart makes a crown lapping tool you can use by hand. I have fixed many a friends truck gun with that thing. Check this link [url=http://www.midwayusa.com/viewproduct/?productnumber=913296]MidwayUSA - R W Hart Barrel Muzzle Crown Lapping Tool Complete Set with 4 Inserts for 22 to 35 Caliber[/url] As a matter of fact my gunsmith borrows it from me quite regularly. To answer your question a tiny nick causes an irregular gas release at the muzzle. The most important area to be sure. The bullet needs to leave the bbl the same way every time for consistent groups. One tiny nick will wreak havoc on group size. This tool beats taking the bbl off and turning a new crown. [/QUOTE]
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Long Range Scopes and Other Optics
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