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The Range
Gunsmithing & Repairs
PSA Adjustable Gas Block
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<blockquote data-quote="TeleStratMan" data-source="post: 3282665" data-attributes="member: 44716"><p>Your suggestion is excellent for anyone who wants a precise setting.</p><p>I was looking for a reliable setting with the adjustment without signs of over pressure. After watching several different Youtube videos on gas block adjustments and most always wound up at 1 3/4 - 2 1/2 turns from closed for the final setting. So starting at 2 turns was logical for me as a starting place. I fired 1 cartridge at a time [3 times] and inspected it for blown or dislocated primers- any bulging in the cartridge or obvious damage and made sure the bolt was locking open.</p><p>The rifle cycled properly and smoothly. 2 turns worked good with the 6.5 CM on my particular build.</p><p>One reason I chose this method is the hand guard on my particular build would require removal to make precise adjustments. I brought tools to the range in case adjustments were needed.</p><p> </p><p>Note: I've got an idea to have an access opening milled in my hand guard where the adjustment screw is located so hand guard removal is not required to make adjustments. I know several machinists that will do it for no charge. I considered drilling a 7/32" D hole to access the adjustment screw but it would be on the edge of one of the M-LOK slots. The hand guard can be milled so the access matches the M-LOK Slots.</p></blockquote><p></p>
[QUOTE="TeleStratMan, post: 3282665, member: 44716"] Your suggestion is excellent for anyone who wants a precise setting. I was looking for a reliable setting with the adjustment without signs of over pressure. After watching several different Youtube videos on gas block adjustments and most always wound up at 1 3/4 - 2 1/2 turns from closed for the final setting. So starting at 2 turns was logical for me as a starting place. I fired 1 cartridge at a time [3 times] and inspected it for blown or dislocated primers- any bulging in the cartridge or obvious damage and made sure the bolt was locking open. The rifle cycled properly and smoothly. 2 turns worked good with the 6.5 CM on my particular build. One reason I chose this method is the hand guard on my particular build would require removal to make precise adjustments. I brought tools to the range in case adjustments were needed. Note: I've got an idea to have an access opening milled in my hand guard where the adjustment screw is located so hand guard removal is not required to make adjustments. I know several machinists that will do it for no charge. I considered drilling a 7/32" D hole to access the adjustment screw but it would be on the edge of one of the M-LOK slots. The hand guard can be milled so the access matches the M-LOK Slots. [/QUOTE]
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