Shooting some VERY DEEP hollow point 500 S&W bullets into Gel

fiver

fiver

Well-Known Member
I caught the flash and slowed down your slow down.
at first I thought it was just light being reflected by the fractured gel being concentrated in one spot.
what I didn't see left behind was any type of dark burn marks from any thing being consumed.
if you can find a carbon mark then something was being burned.
extra powder?
some of the powder coat?
or it was auto ignition of compressed oxygen, that shouldn't leave a carbon stain behind.
I would look for that clue.
 
Full.lead.taco

Full.lead.taco

Active Member
The "gel fart" or the smoke that comes out afterwards would signify a burn or something like that. The smoke coming out the entry hole only happened on the second shot where the flash of light happened. Did you have a chance to take a look at the link I posted below the video? https://en.wikipedia.org/wiki/Sonoluminescence Wondering if that is what is happening.
fiver said:
...
what I didn't see left behind was any type of dark burn marks from any thing being consumed.
if you can find a carbon mark then something was being burned...
Click to expand...
 
Jr.

Jr.

New Member
I have seen this in some videos before, from what I understand, from the shot being fired at close range, some unburned gasses are pulled into the channel along with ambient air by the vacuum created by the bullets velocity. These hot gasses mixed with air inside the gel become compressed when the channel starts to close behind them. This compression causes an effect referred to as 'dieseling' the gasses ignite because of the increased pressure and mixture of air. This causes the flash and subsequently the gasses exiting the entry hole.
 
Rally Hess

Rally Hess

Well-Known Member
Neat video. You list 12 BHN, but what was the alloy? Interesting bullet path after the nose shears off.
 
Full.lead.taco

Full.lead.taco

Active Member
Alloy is linotype/monotype scrap mixed with stained glass window scrap. Ratio of 5 soft to 1 hard if I remember correctly
 
fiver

fiver

Well-Known Member
the old came was dead soft lead.
new came is extruded and contains a percentage of antimony [1-3%] it seems super soft until it is re-melted and cooled.
 
Full.lead.taco

Full.lead.taco

Active Member
One thing I've learned though, by doing different experiments and tests is that you can think or assume something is going to happen, but until you test it--you'll never know for sure. I was told by some guys that the hollow point would blow up on entry to the gel block because it was so deep--and that my camera's would probably be damaged. Instead, what happened is that I got wadcutter type entry holes into the gel, and then the explosive results inside the first gel block.
 
fiver

fiver

Well-Known Member
which would be what you want for hunting.
the thing is your results might [most likely would] change if you back up to 100yds or so.
the thickness of the wall and shape of the nose makes a big difference.

a couple of years back I was shooting ground squirrels with some home made hollow points in my 223.
they kept killing the little guy's but the results were rather unspectacular.
almost like you'd expect from an unstable FMJ.
turns out that the hollow point was actually deterring the expansion of the bullet and I needed to add lead to the tip.
 
Full.lead.taco

Full.lead.taco

Active Member
yes, true... This particular bullet was designed from the ground up to be a watermelon/milk jug smasher even at lower velocities (not really a hunting bullet). What I should do sometime in the future is drop the velocity to about minimum--like a trailboss max load ~ 600ish fps and see what happens. My guess is that parts of the hp would still fragment off due to the extreme depth of it, but expansion would be a bit more controlled. But like I said, it's all a guess and speculation until I test it.
 
Pistolero

Pistolero

Well-Known Member
Looks about right for hunting. Big lung damage, the base would likely exit on
medium and small deer, depending on the angle. I would predict bang-flop.

Bill
 
gman

gman

Well-Known Member
Definitely enjoy your videos! Reviewing your video of the Lyman PID controlled pot made me decide to get one. Also ordered the mold guide from NOE. I bet with a softer alloy and pc’d bullets you could get some impressive expansion with that bullet at slower velocity.
 
Full.lead.taco

Full.lead.taco

Active Member
gman said:
Definitely enjoy your videos! Reviewing your video of the Lyman PID controlled pot made me decide to get one. Also ordered the mold guide from NOE. I bet with a softer alloy and pc’d bullets you could get some impressive expansion with that bullet at slower velocity.
Click to expand...

Thanks gman, I enjoy making the videos! I agree, I think I need to slow them down a bit and see what the bullets do.
 
fiver

fiver

Well-Known Member
if you want spectacular splosions your on the right path.
speed and fragmentation are the key there.
 
Rally Hess

Rally Hess

Well-Known Member
I'd think if you are going to slow it down, maybe 70/30 Soft/COWW. I'd be leery of shooting anything I intended to eat with that deep HP.
 
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