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CBI pistol powder data
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<blockquote data-quote="Dumpstick" data-source="post: 3852353" data-attributes="member: 41653"><p>Time for some more data:</p><p></p><p>44 Mag</p><p>Fired from a Taurus M44 6-5/8" barrel, factory back-bored and ported. Effectively a 5.75" barrel.</p><p>Lee TL430-240-SWC COL 1.655"</p><p>PMC brass, trimmed to 1.275".</p><p> S&B LPP.</p><p></p><p>Lee bullet seated in until 2 "shoulders" are out of the case. Here it is.[ATTACH=full]301117[/ATTACH]</p><p></p><p>All powder charges weighed. 12 rounds fired of each load.</p><p>Chrony 10' from muzzle</p><p></p><p>9.5 gr 1122 fps, ES 44, SD 12.4 - 11 rounds registered</p><p>10.0gr 1150 fps, ES 23, SD 6.7 - very accurate</p><p>10.5gr 1163 fps, ES 49, SD 17.2 - sticky extraction. I consider this max.</p><p></p><p>Notes -</p><p>- the 10.0 gr load was very accurate. I yanked the trigger once, and have one unexplained flyer (probably me), but the rest easily went into a 3" circle at 50 feet. Iron sights, rested. For my money, the best load is going to be somewhere in the 9.5 - 10.0 grain area. I may shoot a 9.0 and 8.5 gr load. If I do, I'll edit.</p><p></p><p> - at 10.5 gr powder, the extraction was very sticky. I'm not going any higher.</p><p></p><p> - The ES and SD cleaned up dramatically from earlier tests. Maybe because I weighed the charges instead of volumetric loading? Maybe because the cases were pretty much full? I don't know.</p><p></p><p> - Again I noticed that this is a very clean-burning powder. Almost no smoke, and what there was could be attributed to the tumble-lube on the bullets.</p><p></p><p>- I originally thought this powder was somewhere a bit faster than Herco in the burn chart. It certainly didn't act that way in this test. It acted faster than Unique/Universal. This is a hard powder to pin down. The recoil in this testing was snappy - like a faster powder.</p><p></p><p>- I think this powder prefers a heavier bullet, and a case more full than not.</p><p>[ATTACH=full]301118[/ATTACH]</p><p></p><p>Edited to add COL, pic of load, pic of target.</p></blockquote><p></p>
[QUOTE="Dumpstick, post: 3852353, member: 41653"] Time for some more data: 44 Mag Fired from a Taurus M44 6-5/8" barrel, factory back-bored and ported. Effectively a 5.75" barrel. Lee TL430-240-SWC COL 1.655" PMC brass, trimmed to 1.275". S&B LPP. Lee bullet seated in until 2 "shoulders" are out of the case. Here it is.[ATTACH type="full"]301117[/ATTACH] All powder charges weighed. 12 rounds fired of each load. Chrony 10' from muzzle 9.5 gr 1122 fps, ES 44, SD 12.4 - 11 rounds registered 10.0gr 1150 fps, ES 23, SD 6.7 - very accurate 10.5gr 1163 fps, ES 49, SD 17.2 - sticky extraction. I consider this max. Notes - - the 10.0 gr load was very accurate. I yanked the trigger once, and have one unexplained flyer (probably me), but the rest easily went into a 3" circle at 50 feet. Iron sights, rested. For my money, the best load is going to be somewhere in the 9.5 - 10.0 grain area. I may shoot a 9.0 and 8.5 gr load. If I do, I'll edit. - at 10.5 gr powder, the extraction was very sticky. I'm not going any higher. - The ES and SD cleaned up dramatically from earlier tests. Maybe because I weighed the charges instead of volumetric loading? Maybe because the cases were pretty much full? I don't know. - Again I noticed that this is a very clean-burning powder. Almost no smoke, and what there was could be attributed to the tumble-lube on the bullets. - I originally thought this powder was somewhere a bit faster than Herco in the burn chart. It certainly didn't act that way in this test. It acted faster than Unique/Universal. This is a hard powder to pin down. The recoil in this testing was snappy - like a faster powder. - I think this powder prefers a heavier bullet, and a case more full than not. [ATTACH type="full"]301118[/ATTACH] Edited to add COL, pic of load, pic of target. [/QUOTE]
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