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Posted: 9/7/2014 9:07:36 AM EDT
Handgun thread was archived (Click here to view that) and I cannot continue on it so here is the new and improved thread. Why improved? well, during the last few months we have updated our gear and taken a new method in use.
This all should allow us to produce even better picture material for your enjoyment. I start this thread with something special; Lahti L-35 9mm pistol used in Finnish Winter war to defend Finland against Soviet Union aggression. Needless to say that it was success. 
We shot old war time lead ammo so blast smoke was guaranteed :) Our plan is to kick in more science in future images so if you have any ideas, please let us know, maybe we can investigate them :) More images at Kuulapaa.com |
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Posted: 9/7/2014 5:41:45 PM EDT
[#1]
Very nice
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Posted: 9/8/2014 9:59:16 AM EDT
[#2]
Excellent. Loved your old thread.
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Posted: 9/8/2014 11:07:43 AM EDT
[#3]
Very cool
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Posted: 9/8/2014 12:57:37 PM EDT
[#4]
why are the slides forward in every pic?
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Posted: 9/8/2014 1:10:07 PM EDT
[#5]
What's the unusual thing in this picture?
No, it's not the ruler on it. Despite the gun looks silent and calm, unlike guns usually do in our pictures, the primer has been struck and powder is actually burning inside. Nothing we can see from outside is implying that though. Imagine that 
Why is the ruler there then you may ask? Well, it's because of our next test. When does the slide start moving? How fast does it move? And how much has it moved when bullet finally exits the barrel? These are the questions we try to answer next. Interested? I am! |
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Posted: 9/8/2014 1:11:04 PM EDT
[#6]
Quote HistoryQuoted:
why are the slides forward in every pic? Because they haven't yet started to move enough for you to see. Those pictures are taken milliseconds after firing and the slides on most guns don't move until after the round is out of the barrel. ETA....OP hit the nail on the head in his post right above mine. Suspect the subsequent pictures will tell a great story! |
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Posted: 9/8/2014 1:36:25 PM EDT
[#7]
Quote HistoryQuoted:
Because they haven't yet started to move enough for you to see. Those pictures are taken milliseconds after firing and the slides on most guns don't move until after the round is out of the barrel. ETA....OP hit the nail on the head in his post right above mine. Suspect the subsequent pictures will tell a great story! Quote HistoryQuoted:
Quoted:
why are the slides forward in every pic? Because they haven't yet started to move enough for you to see. Those pictures are taken milliseconds after firing and the slides on most guns don't move until after the round is out of the barrel. ETA....OP hit the nail on the head in his post right above mine. Suspect the subsequent pictures will tell a great story! Yep, a nice test will be done to illustrate just that 
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Posted: 9/9/2014 6:26:44 PM EDT
[#8]
Interested in the slide movement!
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Posted: 9/14/2014 9:14:07 AM EDT
[#9]
Yesterday I heard that one of my shooting buddies had an incident at range. Nothing too serious but an eye injury. Da*n, eyes again? Hopefully it's not a permanent one.
Guess if he had his eye protection on? No, he did not, so in addition to thousands already existing warnings I made a simple picture with clear message: 
Protect your eyes link I can say I'm on mission: This picture is something I ask you to post and send forward and even print to you local range wall. Don't gamble with your eyes - you can only lose in that game! |
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Posted: 9/15/2014 2:25:38 AM EDT
[#10]
I loved your first thread and look forward to seeing more. |
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Posted: 9/15/2014 5:32:49 PM EDT
[#11]
Glock = mushroom cloud. Always:
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Posted: 9/19/2014 11:04:06 AM EDT
[#12]
Quote HistoryQuoted:
Glock = mushroom cloud. Always: Glock you say? Here are the teasers for the latest set - GLOCK in transitional phase!  
Go check the full set and ENJOY!: www.kuulapaa.com
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Posted: 9/19/2014 5:32:14 PM EDT
[#13]
Awesome pictures! I browsed the rest of your site and saw some commentary about "bullet wobble." How much quantification has there been done on this? It almost sounds similar to a football being thrown...sometimes it can wobble slightly and still be very accurate.
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Posted: 9/19/2014 7:43:51 PM EDT
[#14]
This thread, it's winning.
Thank you OP. |
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Posted: 9/20/2014 2:38:07 AM EDT
[#15]
Quote HistoryQuoted:
Awesome pictures! I browsed the rest of your site and saw some commentary about "bullet wobble." How much quantification has there been done on this? It almost sounds similar to a football being thrown...sometimes it can wobble slightly and still be very accurate. Not that much. I cannot state that all bullets wobble but some bullets seem to be tilted slightly while other ones are straight. But that is only their state during that single frame. Definitely more investigation is needed. 
Bigger picture (Upper picture slide guide line has been lifted slightly to avoid line hitting the bullet side.) Are these bullets wobbling, hard to say... What do you think? |
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Posted: 9/20/2014 9:39:30 AM EDT
[#16]
Awesome thread! Fantastic photos!
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Posted: 9/20/2014 11:19:46 AM EDT
[#17]
Quote HistoryQuoted:
Not that much. I cannot state that all bullets wobble but some bullets seem to be tilted slightly while other ones are straight. But that is only their state during that single frame. Definitely more investigation is needed. http://kuulapaa.com/Duallight/Wobble%20combined_800.jpg Bigger picture (Upper picture slide guide line has been lifted slightly to avoid line hitting the bullet side.) Are these bullets wobbling, hard to say... What do you think? Quote HistoryQuoted:
Quoted:
Awesome pictures! I browsed the rest of your site and saw some commentary about "bullet wobble." How much quantification has there been done on this? It almost sounds similar to a football being thrown...sometimes it can wobble slightly and still be very accurate. Not that much. I cannot state that all bullets wobble but some bullets seem to be tilted slightly while other ones are straight. But that is only their state during that single frame. Definitely more investigation is needed. http://kuulapaa.com/Duallight/Wobble%20combined_800.jpg Bigger picture (Upper picture slide guide line has been lifted slightly to avoid line hitting the bullet side.) Are these bullets wobbling, hard to say... What do you think? Yep, it is hard to say although it certainly does look like the axis of the bullet is not parallel to the bore in those pictures. I have heard that rifle bullets with a "penetrator core" can do something similar, since the center of mass isn't necessarily perfectly in line with the center of rotation, thus causing a little bit of wobble about that axis. Perhaps that is happening in these pistol bullets as well. It is great that your pictures have the resolution to be able to capture what looks like wobble, and to be able to discuss and debate it! |
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Posted: 9/20/2014 3:01:29 PM EDT
[#18]
All bullets wobble, (technically, it is called "yaw").
Rifle bullets are worse than handgun bullets typically, because they are longer. This explains why AP bullets penetrate the most when fired over a 100 meters. The bullet has stabilized, and is able to do its best work. It also explains why FMJ spitzers can be so devastating at close range. I have had a FMJ 7.62 NATO bullet stop after penetrating 3 water filled OJ cartons. Yes, I got a bit wet from the splash. No, there is nothing wrong with my rifle, as so many have wrongly suggested. It is just the nature of the beast at very close range. Mythbusters got the .50 BMG wrong. It does not break up on contact with water, unless fired at very close range. Give that big bullet time to stabilize, and it will penetrate quite a few feet of water. The military did tests on this, I have seen the results. I don't remember the actual numbers, but swimming underwater will not protect you from a .50. 
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Posted: 9/21/2014 8:30:37 AM EDT
[#19]
Can't say much about wobbling or yawning in this but it's a slightly improved version of previous image.
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Posted: 9/21/2014 9:26:25 AM EDT
[#20]
Quote HistoryQuoted:
Not that much. I cannot state that all bullets wobble but some bullets seem to be tilted slightly while other ones are straight. But that is only their state during that single frame. Definitely more investigation is needed. http://kuulapaa.com/Duallight/Wobble%20combined_800.jpg Bigger picture (Upper picture slide guide line has been lifted slightly to avoid line hitting the bullet side.) Are these bullets wobbling, hard to say... What do you think? Quote HistoryQuoted:
Quoted:
Awesome pictures! I browsed the rest of your site and saw some commentary about "bullet wobble." How much quantification has there been done on this? It almost sounds similar to a football being thrown...sometimes it can wobble slightly and still be very accurate. Not that much. I cannot state that all bullets wobble but some bullets seem to be tilted slightly while other ones are straight. But that is only their state during that single frame. Definitely more investigation is needed. http://kuulapaa.com/Duallight/Wobble%20combined_800.jpg Bigger picture (Upper picture slide guide line has been lifted slightly to avoid line hitting the bullet side.) Are these bullets wobbling, hard to say... What do you think? Uneven weight distribution of the lube on the bullet? Some of it seems to have come off. Could that unbalance a bullet? Maybe the bullet was slightly undersized for the bore? Perhaps the barrel is at the end of it's service life, or just doesn't like unjacketed bullets? |
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Posted: 9/22/2014 1:02:25 AM EDT
[#21]
Now this is interesting.
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Posted: 9/24/2014 7:53:53 PM EDT
[#22]
This thread is awesome
I'd love to get some of these pictures framed for my (future) man cave 
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Posted: 9/25/2014 6:43:16 AM EDT
[#23]
Great photography!
I am interested in the slide movement findings. |
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Posted: 9/25/2014 9:32:45 PM EDT
[#24]
Great pics!
There was once a nimrod in arfcom who argued that a semi slide began to move the second (or milli-second) the rd was fired. Despite my best attempts at logic, i.e. bullets move faster than a slide, he remained solid in his ignorance. 
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Posted: 9/27/2014 3:45:24 PM EDT
[#25]
Neat pics OP!
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Posted: 9/29/2014 3:51:00 AM EDT
[#26]
Quote HistoryQuoted:
Great pics!
There was once a nimrod in arfcom who argued that a semi slide began to move the second (or milli-second) the rd was fired. Despite my best attempts at logic, i.e. bullets move faster than a slide, he remained solid in his ignorance.
I'll take "How do barrel lugs work?" for $400, Alex. |
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Posted: 9/30/2014 5:57:37 AM EDT
[#27]
Quote HistoryQuoted:
Great pics!
There was once a nimrod in arfcom who argued that a semi slide began to move the second (or milli-second) the rd was fired. Despite my best attempts at logic, i.e. bullets move faster than a slide, he remained solid in his ignorance.
Umm...it does. There was a high speed clip on youtube, can't find it now, but they had marks on both the slide and frame (IIRC it was a STI IPSC gun). Before the bullet exited the barrel, the slide was moving. It's plain as day. Ahh...here it is (hit mute before you watch it...I can't find the original, and someone dubbed a horrible song on this  )
Here's a screenshot, if you can't be bothered...note the bullet is _just_ exiting the barrel, and look at how far the slide's already moved: 
Edit - stupid thing won't un-whitebox...the url is http://www.youtube.com/watch?feature=player_detailpage&v=G0VjdI_S_HM#t=65 |
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Posted: 10/5/2014 12:07:20 PM EDT
[#28]
Yep, energy starts to affect slide at the same exact moment it moves the bullet. Only difference is the mass and thus the velocity. That's a pretty much what I can show as well.
To do things a little bit differently we're putting in some comp guns: 
Some gun stuff |
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Posted: 10/5/2014 5:58:37 PM EDT
[#29]
I want a high speed camera
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Posted: 10/7/2014 2:32:27 AM EDT
[#30]
My buddy actually took this photo. Pretty sweet timing; makes me wish my camera was high speed (no pun intended) so that I could get more pics like it.
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Posted: 10/9/2014 1:51:00 PM EDT
[#31]
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Posted: 10/10/2014 9:13:30 AM EDT
[#32]
Here is the same Edge than previously, but with better ruler:
Test gun slide (STI Edge) has moved 1.5 millimeters or 0.06 inches while the bullet is still partly inside barrel. Same thing applies roughly to all pistols. This picture can be posted to other forums as well, when needed :) |
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