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The Range
Rifle & Shotgun Discussion
300blk subs that cycle.
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<blockquote data-quote="ASP785" data-source="post: 2401193" data-attributes="member: 12170"><p>I use 8.2 grains of Lil Gun with a 220 SMK. With an H2 buffer , Noveske 10.5 in barrel and 7.62 SDN6 can, it cycles flawlessly until it gets to about 200 rounds. After that the bolt starts failing to lock back on the last round. I really want to try some AA1680 as that is supposed to be the ideal powder, but in the last year I have not found any. Subsonics are pretty challenging to load for. If you do not have a solid reloading process, you will either get loads that fail to cycle or loads that will crack the sound barrier. It's a pretty narrow window.</p></blockquote><p></p>
[QUOTE="ASP785, post: 2401193, member: 12170"] I use 8.2 grains of Lil Gun with a 220 SMK. With an H2 buffer , Noveske 10.5 in barrel and 7.62 SDN6 can, it cycles flawlessly until it gets to about 200 rounds. After that the bolt starts failing to lock back on the last round. I really want to try some AA1680 as that is supposed to be the ideal powder, but in the last year I have not found any. Subsonics are pretty challenging to load for. If you do not have a solid reloading process, you will either get loads that fail to cycle or loads that will crack the sound barrier. It's a pretty narrow window. [/QUOTE]
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The Range
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300blk subs that cycle.
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