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Rifles, Reloading, Optics, Equipment
Reloading
To slug or not for Cast bullets
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<blockquote data-quote="Gunpoor" data-source="post: 910631" data-attributes="member: 8358"><p>Where groove diameter comes into play with bullet diameter is in revolvers. If there is a discrepancy between throat diameter and barrel groove diameter this will affect accuracy. Most of the problems with this issue has been corrected in the newer guns, so unless you are shooting older Colts or the early Rugers and some of the knockoffs you will probably never encounter this problem. I would recommend buy cast bullets .001" larger than listed groove diameter of your handguns and you will probably not have any size issues. This does not mean you won't see any leading in the bores because commercially cast bullets are usually cast to BHN (Brinnel hardness number) of at least 16 and sometimes as hard as 20. I think they cast them this hard to keep from suffering deformation from rough handling during shipping. I wish I could buy bullets cast to about 12-13 BHN but I just tolerate some barrel leading because I don't shoot enough of them to justify the expense and bother to cast my own. If you are serious about reducing barrel leading, cast bullets are readily available with a gas check base. A GC bullet has a copper buffer installed/crimped on the base of the bullet that greatly reduces lead melt off during ignition. I have used some of these type cast bullets and they do work but they are more expensive.</p></blockquote><p></p>
[QUOTE="Gunpoor, post: 910631, member: 8358"] Where groove diameter comes into play with bullet diameter is in revolvers. If there is a discrepancy between throat diameter and barrel groove diameter this will affect accuracy. Most of the problems with this issue has been corrected in the newer guns, so unless you are shooting older Colts or the early Rugers and some of the knockoffs you will probably never encounter this problem. I would recommend buy cast bullets .001" larger than listed groove diameter of your handguns and you will probably not have any size issues. This does not mean you won't see any leading in the bores because commercially cast bullets are usually cast to BHN (Brinnel hardness number) of at least 16 and sometimes as hard as 20. I think they cast them this hard to keep from suffering deformation from rough handling during shipping. I wish I could buy bullets cast to about 12-13 BHN but I just tolerate some barrel leading because I don't shoot enough of them to justify the expense and bother to cast my own. If you are serious about reducing barrel leading, cast bullets are readily available with a gas check base. A GC bullet has a copper buffer installed/crimped on the base of the bullet that greatly reduces lead melt off during ignition. I have used some of these type cast bullets and they do work but they are more expensive. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
To slug or not for Cast bullets
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