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Rifles, Reloading, Optics, Equipment
Reloading
need your thoughts on a 6.5 Gibbs
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<blockquote data-quote="Dan B" data-source="post: 147684" data-attributes="member: 367"><p>James...I'm shooting 65gr RL-22 in the .30 Gibbs and getting 168gr SMK's to over 3000fps from a 25.5" barrel. Does not really help...but just a note.</p><p></p><p>But for the smaller bore your using...I'd certainly think that something slower would help. From looking over a few load manuals and comparing like bore sizes to your case capacity, it looks like RL-22 is middle of the pack for burn rate. H1000 is listed toward the slow end of the scale...but I'd try it. Slower powders seem to be more forgiving at top end than faster powders.</p><p></p><p>Another thought...many of the Gibbs cartridges were developed before good chronographs were available. Also most of the superb performance of these rounds was drummed up by guesses and ego than actual numbers. You may be chasing an unattainable goal if your "All I've read says 3300 should be easy with this long of barrel" information came from old magazines or cartridge history from the internet. Been there, done that with the .30 Gibbs...best story...one fella told me that his .30 Gibbs was shooting 168gr SMK's at 3700fps. /ubbthreads/images/graemlins/confused.gif</p></blockquote><p></p>
[QUOTE="Dan B, post: 147684, member: 367"] James...I'm shooting 65gr RL-22 in the .30 Gibbs and getting 168gr SMK's to over 3000fps from a 25.5" barrel. Does not really help...but just a note. But for the smaller bore your using...I'd certainly think that something slower would help. From looking over a few load manuals and comparing like bore sizes to your case capacity, it looks like RL-22 is middle of the pack for burn rate. H1000 is listed toward the slow end of the scale...but I'd try it. Slower powders seem to be more forgiving at top end than faster powders. Another thought...many of the Gibbs cartridges were developed before good chronographs were available. Also most of the superb performance of these rounds was drummed up by guesses and ego than actual numbers. You may be chasing an unattainable goal if your "All I've read says 3300 should be easy with this long of barrel" information came from old magazines or cartridge history from the internet. Been there, done that with the .30 Gibbs...best story...one fella told me that his .30 Gibbs was shooting 168gr SMK's at 3700fps. [img]/ubbthreads/images/graemlins/confused.gif[/img] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
need your thoughts on a 6.5 Gibbs
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