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Rifles, Reloading, Optics, Equipment
Reloading
Unburnt powder when reloading hammers?
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<blockquote data-quote="Ross1147" data-source="post: 2651955" data-attributes="member: 106919"><p>So have a first for me. Trying to reload for a .458 SOCOM and a 250 grain Shock Hammer. Reload data is all over the place when searching online, so I started with Nosler max load data for a 300 grain bullet and IMR 4198 (40 grains). I full length sized virgin brass and loaded the SH to the first grove and 1/4 crimped using a Lee crimping die. Also using CCI 300 large pistol primers in an AR-15 with a 16.5" tromix upper.</p><p></p><p>So, I loaded 3 at 40 grains and went to shoot them at 50 yds. Abysmal group, just about 2" (of note I forgot to crimp these, didn't realize until I shot). Speed was 1820 fps. The brass looked great, so I started to work up (all crimped from here). At 41 grains speed was 1859 fps. 41.5 grains registered at 1871 fps, but there was a very slight ejector mark the primer looked like it was pierced just slightly. </p><p></p><p>Contemplated not shooting the one I loaded at 42 grains, but curiosity got the best of me. When I shot this one the bolt didn't lock back? It had locked back on every other load. Speed was 1914 fps. Brass looked great, no ejector mark, no primer flattening, no pierced primer. But, there was unburnt powder in the acton and in the barrel? It's not a ton but it's there, see pic.</p><p></p><p>Of note these 3 shots grouped just under an inch. This load is compressed. Assuming if I add more powder it will lead to more unburnt powder? </p><p></p><p>Do I crimp more? Change primers to LRP (I don't have any large pistol mag)? Add more powder to compress more? Just be happy with group and ignore unburnt powder?</p><p></p><p>Where to go?? Thanks!</p><p></p><p>Ryan</p></blockquote><p></p>
[QUOTE="Ross1147, post: 2651955, member: 106919"] So have a first for me. Trying to reload for a .458 SOCOM and a 250 grain Shock Hammer. Reload data is all over the place when searching online, so I started with Nosler max load data for a 300 grain bullet and IMR 4198 (40 grains). I full length sized virgin brass and loaded the SH to the first grove and 1/4 crimped using a Lee crimping die. Also using CCI 300 large pistol primers in an AR-15 with a 16.5” tromix upper. So, I loaded 3 at 40 grains and went to shoot them at 50 yds. Abysmal group, just about 2” (of note I forgot to crimp these, didn’t realize until I shot). Speed was 1820 fps. The brass looked great, so I started to work up (all crimped from here). At 41 grains speed was 1859 fps. 41.5 grains registered at 1871 fps, but there was a very slight ejector mark the primer looked like it was pierced just slightly. Contemplated not shooting the one I loaded at 42 grains, but curiosity got the best of me. When I shot this one the bolt didn’t lock back? It had locked back on every other load. Speed was 1914 fps. Brass looked great, no ejector mark, no primer flattening, no pierced primer. But, there was unburnt powder in the acton and in the barrel? It’s not a ton but it’s there, see pic. Of note these 3 shots grouped just under an inch. This load is compressed. Assuming if I add more powder it will lead to more unburnt powder? Do I crimp more? Change primers to LRP (I don’t have any large pistol mag)? Add more powder to compress more? Just be happy with group and ignore unburnt powder? Where to go?? Thanks! Ryan [/QUOTE]
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Unburnt powder when reloading hammers?
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