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Rifles, Reloading, Optics, Equipment
Reloading
Berger 155.5 fullbore ?? Help
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<blockquote data-quote="milanuk" data-source="post: 531519" data-attributes="member: 376"><p>I normally jump the B155.5BT about 0.045-0.050" in my 12 F/TR. With the factory Obermeyer chamber (and a little bit of wear on the throat) that currently leaves me with just under 0.100" of bearing surface still in the case neck - but it does shoot *very* well...</p><p></p><p>The general rule of thumb I'd always heard was to try and keep at least 1/2 caliber worth of bearing surface in the neck, i.e. about 150 thou minimum for a .30 cal. Obviously not a hard and fast rule as per above, but I'm dealing with relatively delicate target rounds on a flat range, not something used in the field.</p></blockquote><p></p>
[QUOTE="milanuk, post: 531519, member: 376"] I normally jump the B155.5BT about 0.045-0.050" in my 12 F/TR. With the factory Obermeyer chamber (and a little bit of wear on the throat) that currently leaves me with just under 0.100" of bearing surface still in the case neck - but it does shoot *very* well... The general rule of thumb I'd always heard was to try and keep at least 1/2 caliber worth of bearing surface in the neck, i.e. about 150 thou minimum for a .30 cal. Obviously not a hard and fast rule as per above, but I'm dealing with relatively delicate target rounds on a flat range, not something used in the field. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Berger 155.5 fullbore ?? Help
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