Hey guys and gals . I was debating on where to start this thread Because this is both internal and external ballistics and decided here instead of the reloading sub forum .
Several years ago I read and or watched a video about something called "muzzle brake pull off" and although the theory seem possible I never really gave it much thought .
So what the heck am I talking about you ask ? Muzzle brake pull off as I understand it is the effect/movement of your muzzle caused buy the air/gasses being pushed/forced out of the barrel and engaging the muzzle brake BEFORE the bullet exits the bore . The theory is that there is at minimum air in the bore in front of the bullet . When the bullet engraves into the lands that seals that end of the bore forcing everything out the other end ahead of the bullet . Well air compresses and the bullets movement forward actually compresses the air in the bore as it's pushed/forced forward . The forward compressed air exiting the bore and hitting a muzzle break and really any muzzle device can and does move your muzzle and creates POA to POI shifts or worse inconsistent groups .
I hope I explained that well enough for it to seem like a reasonable theory to all of you . I had never gave all that much thought until last night when I saw this video of the shock waves of a bullet in flight .
https://www.youtube.com/watch?v=BPwdlEgLn5Q
On the whole the video is pretty cool at first but when the video reaches the 6:51 mark when they looked at the muzzle blast . OMG I can't believe how much air and gasses come out of the bore BEFORE the bullet exits ! Not only air but am I seeing actual blast coming out before the bullet ???
If so , then this would seem to confirm something Unclenick has talked about many times here at TFL . That is gasses passing by the bullet BEFORE it engages the lands .
Anyways I just wanted to get your guys thoughts on this and If I'm seeing what I believe I am seeing . Which is in fact enough air and or gasses exiting the bore in front of the bullet to cause your muzzle device to pull you off target ? You can see it much better on the revolver being fired but I suspect the rifle has quite a bit too.
Several years ago I read and or watched a video about something called "muzzle brake pull off" and although the theory seem possible I never really gave it much thought .
So what the heck am I talking about you ask ? Muzzle brake pull off as I understand it is the effect/movement of your muzzle caused buy the air/gasses being pushed/forced out of the barrel and engaging the muzzle brake BEFORE the bullet exits the bore . The theory is that there is at minimum air in the bore in front of the bullet . When the bullet engraves into the lands that seals that end of the bore forcing everything out the other end ahead of the bullet . Well air compresses and the bullets movement forward actually compresses the air in the bore as it's pushed/forced forward . The forward compressed air exiting the bore and hitting a muzzle break and really any muzzle device can and does move your muzzle and creates POA to POI shifts or worse inconsistent groups .
I hope I explained that well enough for it to seem like a reasonable theory to all of you . I had never gave all that much thought until last night when I saw this video of the shock waves of a bullet in flight .
https://www.youtube.com/watch?v=BPwdlEgLn5Q
On the whole the video is pretty cool at first but when the video reaches the 6:51 mark when they looked at the muzzle blast . OMG I can't believe how much air and gasses come out of the bore BEFORE the bullet exits ! Not only air but am I seeing actual blast coming out before the bullet ???
If so , then this would seem to confirm something Unclenick has talked about many times here at TFL . That is gasses passing by the bullet BEFORE it engages the lands .
Anyways I just wanted to get your guys thoughts on this and If I'm seeing what I believe I am seeing . Which is in fact enough air and or gasses exiting the bore in front of the bullet to cause your muzzle device to pull you off target ? You can see it much better on the revolver being fired but I suspect the rifle has quite a bit too.
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