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The Range
Rifle & Shotgun Discussion
Frankenstein AR-15 troubleshooting question
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<blockquote data-quote="sparkstable" data-source="post: 3829752" data-attributes="member: 6371"><p>So I made it to the range today. I did not have my milspec buffer/buffer spring from my MP15... forgot it at a friends house in Texas last weekend, lol. BUT... I did have a H2 buffer and the bcg from the MP15,</p><p></p><p>Cleaned the gun and lubed it up well (kind of like you suggested undeg01). Tried the same two ammos (Winchester whitebox and PMC X-Tac 55gr).</p><p></p><p>Without changing anything the Winchester worked fine over probably 25-50 reloads (one round in each mag, five mags laid out... ran through them and then did it all over again multiple times). The PMC stuck on 2 of the first 5.</p><p></p><p>With the H2 things seemed better at first... but the PMC still didn't hold the bolt open regularly.</p><p></p><p>With the H3 and the basic bcg from the MP15 everything worked fine. Went back to the ToolCraft NiB and H3 and ran more Winchester... everything was fine.</p><p></p><p>The boxes for the two ammos indicated that the Winchester ran at about 60fps higher at muzzle than the PMC... I am assuming those were from the same barrel length.</p><p></p><p>Not quite 100% sure what this means. I didn't have enough PMC with me (dummy me didn't bring much to the range) to get really good testing done, but the Winchester never failed. I probably put close to, or maybe a little over, 100 rounds through total with the Winchester.</p></blockquote><p></p>
[QUOTE="sparkstable, post: 3829752, member: 6371"] So I made it to the range today. I did not have my milspec buffer/buffer spring from my MP15... forgot it at a friends house in Texas last weekend, lol. BUT... I did have a H2 buffer and the bcg from the MP15, Cleaned the gun and lubed it up well (kind of like you suggested undeg01). Tried the same two ammos (Winchester whitebox and PMC X-Tac 55gr). Without changing anything the Winchester worked fine over probably 25-50 reloads (one round in each mag, five mags laid out... ran through them and then did it all over again multiple times). The PMC stuck on 2 of the first 5. With the H2 things seemed better at first... but the PMC still didn't hold the bolt open regularly. With the H3 and the basic bcg from the MP15 everything worked fine. Went back to the ToolCraft NiB and H3 and ran more Winchester... everything was fine. The boxes for the two ammos indicated that the Winchester ran at about 60fps higher at muzzle than the PMC... I am assuming those were from the same barrel length. Not quite 100% sure what this means. I didn't have enough PMC with me (dummy me didn't bring much to the range) to get really good testing done, but the Winchester never failed. I probably put close to, or maybe a little over, 100 rounds through total with the Winchester. [/QUOTE]
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