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Long Range Hunting & Shooting
Question on tuning a load
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<blockquote data-quote="L.Sherm" data-source="post: 1627647" data-attributes="member: 102083"><p>I had a problem once with 221 fireball brass being really short to the datum line screwing up headspace on a 20VT one time normally I just backed of my load about .75 and all was good on this particular brass I had to back off 4 grains otherwise problems untill it was shot once. I would measure a fired case and then get a measurement off of a factory round almost looks like the case is slamming against the boltface causing the shiny spot from the plunger hole. You can buy bump gauges or if you know of a Smith nearby that has a reamer he can make you one out of a piece of old barrel</p></blockquote><p></p>
[QUOTE="L.Sherm, post: 1627647, member: 102083"] I had a problem once with 221 fireball brass being really short to the datum line screwing up headspace on a 20VT one time normally I just backed of my load about .75 and all was good on this particular brass I had to back off 4 grains otherwise problems untill it was shot once. I would measure a fired case and then get a measurement off of a factory round almost looks like the case is slamming against the boltface causing the shiny spot from the plunger hole. You can buy bump gauges or if you know of a Smith nearby that has a reamer he can make you one out of a piece of old barrel [/QUOTE]
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Question on tuning a load
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