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Rifles, Reloading, Optics, Equipment
Reloading
Pressure signs well above max load?
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<blockquote data-quote="cohunt" data-source="post: 2332981" data-attributes="member: 94491"><p>That's about right, but you could turn it down just a bit more to eject around 4 o'clock and still have reliable functioning.</p><p></p><p>The gas pushes back through the gas tube to the key and pushes the bolt back until it "unlocks" and turns the bolt, then it continues back against the buffer and spring to slow it down so as not to bottom or have too much bounce before returning forward to load another round.</p><p></p><p>Basically the extra buffer weight helps control bolt bounce, the spring controls bcg rebound and ability to strip rounds from the mag, the gas hole opening and gas length control the pressure and volume of gas back to the gas key/bolt .</p><p></p><p>If your powder/bullet combo is creating a higher pressure at your gas hole then it will try to unlock the bolt before it should be therefore it can create false pressure signs.</p><p></p><p>If you stick with that same bullet/powder combo, the only way to reduce the "energy" back to the bolt is to reduce the gas hole size ( this is what adjustable gas blocks do)</p><p></p><p>A heavy buffer will slow the unlock time slightly but it takes more gas to make all your loads cycle reliably, i feel you are better off limiting gas to the bolt and keeping it behind the bullet pushing it down the barrel.</p><p></p><p>I'm not a huge fan of "venting/bleed off" gas blocks because you are wasting a small amount of your gas pressure by venting it to the air and not keeping it behind the bullet.</p><p></p><p>A heavier buffer/spring combo will be more forgiving over multiple loads, but a lighter buffer/spring with the right size gas hole is better for gun longevity but it is more finicky and needs more adjustment for multiple loads.</p><p></p><p>I feel an adjustable gas block should be adjusted for individual loads and it's not a set it/forget it tool.</p><p></p><p>Just my 2c</p></blockquote><p></p>
[QUOTE="cohunt, post: 2332981, member: 94491"] That's about right, but you could turn it down just a bit more to eject around 4 o'clock and still have reliable functioning. The gas pushes back through the gas tube to the key and pushes the bolt back until it "unlocks" and turns the bolt, then it continues back against the buffer and spring to slow it down so as not to bottom or have too much bounce before returning forward to load another round. Basically the extra buffer weight helps control bolt bounce, the spring controls bcg rebound and ability to strip rounds from the mag, the gas hole opening and gas length control the pressure and volume of gas back to the gas key/bolt . If your powder/bullet combo is creating a higher pressure at your gas hole then it will try to unlock the bolt before it should be therefore it can create false pressure signs. If you stick with that same bullet/powder combo, the only way to reduce the "energy" back to the bolt is to reduce the gas hole size ( this is what adjustable gas blocks do) A heavy buffer will slow the unlock time slightly but it takes more gas to make all your loads cycle reliably, i feel you are better off limiting gas to the bolt and keeping it behind the bullet pushing it down the barrel. I'm not a huge fan of "venting/bleed off" gas blocks because you are wasting a small amount of your gas pressure by venting it to the air and not keeping it behind the bullet. A heavier buffer/spring combo will be more forgiving over multiple loads, but a lighter buffer/spring with the right size gas hole is better for gun longevity but it is more finicky and needs more adjustment for multiple loads. I feel an adjustable gas block should be adjusted for individual loads and it's not a set it/forget it tool. Just my 2c [/QUOTE]
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Reloading
Pressure signs well above max load?
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