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Rifles, Reloading, Optics, Equipment
AR15/10 Rifles
Is my new adjustable gas block bad?
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<blockquote data-quote="cohunt" data-source="post: 2738466" data-attributes="member: 94491"><p>Yes- I use slr blocks on all my ar's</p><p></p><p>It's a complicated equation that uses the pressure (ammo related) and volume (gas hole size and gas tube length related) over a certain amount of time (dwell time) </p><p></p><p>Lots of things can change variables in the system-- ammo pressure/speed, powder burn rates, gas hole size ( this can be changed with an adj gas block) , gas tube length, barrel length, bcg weight, spring rate, buffer weight</p><p></p><p>For each set of variables a certain volume of gas at a certain pressure over a certain length of time is required to properly operate the bcg system--- anything "extra" isn't really extra- it should be kept in the barrel if possible. I used the bolt gun as a comparison because there is no "extra" gas in that system as anyone can see-- its all used for 1 purpose of getting the bullet out of the barrel. Why vent gas when it can be used to push that bullet a few fps faster?</p><p></p><p>I've done quite a bit of testing changing out components and with the sa "venting system"--- there was a very small loss in muzzle velocity that I found--- most handloaders strive to get the highest velocity with greatest accuracy possible-- why toss even a small amount of that hard work/speed out the door if it's not necessary? </p><p></p><p>There is no "extra" gas when properly adjusted. </p><p></p><p>I've run titanium carriers, lightweight springs, and ultralight 1oz buffers to decrease lock time and increase cyclic rate and every system can be balanced using an adjustable gas block--- the lighter the components, the less forgiving the adjustments but you can make them work with the right gas block. </p><p></p><p>I never understood the principles behind letting gas out of the system in the sa blocks--- I gave them a try and prefer slr blocks .</p></blockquote><p></p>
[QUOTE="cohunt, post: 2738466, member: 94491"] Yes- I use slr blocks on all my ar's It's a complicated equation that uses the pressure (ammo related) and volume (gas hole size and gas tube length related) over a certain amount of time (dwell time) Lots of things can change variables in the system-- ammo pressure/speed, powder burn rates, gas hole size ( this can be changed with an adj gas block) , gas tube length, barrel length, bcg weight, spring rate, buffer weight For each set of variables a certain volume of gas at a certain pressure over a certain length of time is required to properly operate the bcg system--- anything "extra" isn't really extra- it should be kept in the barrel if possible. I used the bolt gun as a comparison because there is no "extra" gas in that system as anyone can see-- its all used for 1 purpose of getting the bullet out of the barrel. Why vent gas when it can be used to push that bullet a few fps faster? I've done quite a bit of testing changing out components and with the sa "venting system"--- there was a very small loss in muzzle velocity that I found--- most handloaders strive to get the highest velocity with greatest accuracy possible-- why toss even a small amount of that hard work/speed out the door if it's not necessary? There is no "extra" gas when properly adjusted. I've run titanium carriers, lightweight springs, and ultralight 1oz buffers to decrease lock time and increase cyclic rate and every system can be balanced using an adjustable gas block--- the lighter the components, the less forgiving the adjustments but you can make them work with the right gas block. I never understood the principles behind letting gas out of the system in the sa blocks--- I gave them a try and prefer slr blocks . [/QUOTE]
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AR15/10 Rifles
Is my new adjustable gas block bad?
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