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The Range
NFA & Class III Discussion
Jumping into form 1 cans
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<blockquote data-quote="joegrizzy" data-source="post: 3630152" data-attributes="member: 45524"><p>baffle design from what i've read is best suited with the tips of the cones facing the muzzle. according to stuff that sounds good enough to me, especially if your baffles are clipped, when the bullet goes through the hole, horizontal forces are induced on the rapidly expanding gasses as the pressure wave around the bullet gets sheared away by the baffles. this horizontal turbulence in essence just makes the flow of the gas disrupted and forces it to bounce around inside the can, rather than all exit the end of the barrel in the nice, uniform wave. this causes the sharp spike of the initial pressure wave after the bullet exits (and a bit before!) to level off, AND reduces the amount of reverberation from that initial blast. </p><p></p><p>that being said, i *have* seen can designs that have the cones facing *away* from the muzzle. pretty sure they were still effective, but imo i don't see how they could be *more* effective. </p><p></p><p>the reason why you are getting inconsistent results with your 10/22 is barrel length and bullet velocity. out of a 4'' pistol barrel, most normally loaded .22lr is going to come out of the barrel at subsonic velocities. however, out of a 16'' or longer barrel, unless the ammo is subsonic, it's going to be cracking when it comes out. you are hearing some of the bullets crack the sound barrier, while some may not. that's just the beauty of shooting .22lr suppressed.</p><p></p><p>as to why it sounded louder than 9mm, were you shooting subsonic 9mm ammo? anything bigger than 145gr or so 9mm is going to be subsonic. in my experience, the biggest difference in effectiveness of the can is definitely how fast the bullet is moving.</p></blockquote><p></p>
[QUOTE="joegrizzy, post: 3630152, member: 45524"] baffle design from what i've read is best suited with the tips of the cones facing the muzzle. according to stuff that sounds good enough to me, especially if your baffles are clipped, when the bullet goes through the hole, horizontal forces are induced on the rapidly expanding gasses as the pressure wave around the bullet gets sheared away by the baffles. this horizontal turbulence in essence just makes the flow of the gas disrupted and forces it to bounce around inside the can, rather than all exit the end of the barrel in the nice, uniform wave. this causes the sharp spike of the initial pressure wave after the bullet exits (and a bit before!) to level off, AND reduces the amount of reverberation from that initial blast. that being said, i *have* seen can designs that have the cones facing *away* from the muzzle. pretty sure they were still effective, but imo i don't see how they could be *more* effective. the reason why you are getting inconsistent results with your 10/22 is barrel length and bullet velocity. out of a 4'' pistol barrel, most normally loaded .22lr is going to come out of the barrel at subsonic velocities. however, out of a 16'' or longer barrel, unless the ammo is subsonic, it's going to be cracking when it comes out. you are hearing some of the bullets crack the sound barrier, while some may not. that's just the beauty of shooting .22lr suppressed. as to why it sounded louder than 9mm, were you shooting subsonic 9mm ammo? anything bigger than 145gr or so 9mm is going to be subsonic. in my experience, the biggest difference in effectiveness of the can is definitely how fast the bullet is moving. [/QUOTE]
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