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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Does A Can or Suppresor Increase Back Pressure and Decrease Velocity??? Well????
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<blockquote data-quote="SixDemonBag" data-source="post: 2439093" data-attributes="member: 113754"><p>My real world experience with a SAKER 7.62</p><p></p><p>Gas guns (AR) with mid length gas system. Increases gas and changes the brass throw to almost forward vice 4:00 (over-gassed). This is why I use SLR adjustable gas blocks and know the "clik" settings just like you would know your rifle loads DOPE. Turn down the gas and you are back in business. I guess you could say this increases back pressure but also increased velocity slightly 10-15 FPS. I don't really consider that much of a big deal in a gas gun because it isn't running a maximum load and that FPS difference is within my margin of error on plinking rounds I made on the Dillon.</p><p></p><p>Bolt guns: Increase in velocity 10-25FPS depending on the load. I have never seen a decrease in velocity nor did I see any pressure signs on my warmer loads with can on vs can off. Always an increase. </p><p></p><p>Brakes? Never seen a decrease in velocity on an threaded brake my guess is its pass the actual barrel at that point and gas is venting already. Maybe on a brake system that has holes drilled or cut into the barrel could bleed some gas before the projectile leaves the rifling.</p><p></p><p></p><p>How about a rifle with a can that uses the brake as the mount? What I have seen on mine is velocity once again increases slightly.</p><p></p><p>Hope this helps.</p></blockquote><p></p>
[QUOTE="SixDemonBag, post: 2439093, member: 113754"] My real world experience with a SAKER 7.62 Gas guns (AR) with mid length gas system. Increases gas and changes the brass throw to almost forward vice 4:00 (over-gassed). This is why I use SLR adjustable gas blocks and know the "clik" settings just like you would know your rifle loads DOPE. Turn down the gas and you are back in business. I guess you could say this increases back pressure but also increased velocity slightly 10-15 FPS. I don't really consider that much of a big deal in a gas gun because it isn't running a maximum load and that FPS difference is within my margin of error on plinking rounds I made on the Dillon. Bolt guns: Increase in velocity 10-25FPS depending on the load. I have never seen a decrease in velocity nor did I see any pressure signs on my warmer loads with can on vs can off. Always an increase. Brakes? Never seen a decrease in velocity on an threaded brake my guess is its pass the actual barrel at that point and gas is venting already. Maybe on a brake system that has holes drilled or cut into the barrel could bleed some gas before the projectile leaves the rifling. How about a rifle with a can that uses the brake as the mount? What I have seen on mine is velocity once again increases slightly. Hope this helps. [/QUOTE]
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Does A Can or Suppresor Increase Back Pressure and Decrease Velocity??? Well????
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