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Rifles, Reloading, Optics, Equipment
AR15/10 Rifles
Over pressure? but i don't understand this!
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<blockquote data-quote="CaptnC" data-source="post: 1605433" data-attributes="member: 101755"><p>Some quick findings...I used the 375 comparator bushing to measure the cases.</p><p></p><p>First, I measured a bunch of range pick up brass. 1.199 to 1.995</p><p></p><p>Brass that was stuck in 24" barrel, but not badly damaged. 1.199 to 1.1996</p><p></p><p>20 cases fired in 24" barrel that appear to be normal fired cases 1.195 to 1.196</p><p></p><p>Loads data for 20 cases; H335 28.3gr 123 SST at 2525fps</p><p></p><p>Benchmark loads that fired without issue. Same case measurements as 20 listed above. 27.3gr (Hodgdon max load) 120gr Pro Hunter </p><p></p><p></p><p>My thoughts are Benchmark powder has a pressure spike at just over 28 grains in this barrel length, even though the Hodgdon max for the 107gr SMK is 29 grains. But according to the load data they use a 24" barrel for testing.</p></blockquote><p></p>
[QUOTE="CaptnC, post: 1605433, member: 101755"] Some quick findings...I used the 375 comparator bushing to measure the cases. First, I measured a bunch of range pick up brass. 1.199 to 1.995 Brass that was stuck in 24" barrel, but not badly damaged. 1.199 to 1.1996 20 cases fired in 24" barrel that appear to be normal fired cases 1.195 to 1.196 Loads data for 20 cases; H335 28.3gr 123 SST at 2525fps Benchmark loads that fired without issue. Same case measurements as 20 listed above. 27.3gr (Hodgdon max load) 120gr Pro Hunter My thoughts are Benchmark powder has a pressure spike at just over 28 grains in this barrel length, even though the Hodgdon max for the 107gr SMK is 29 grains. But according to the load data they use a 24" barrel for testing. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
AR15/10 Rifles
Over pressure? but i don't understand this!
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