Custom Machined 12ga Expanding Copper Slugs -Beta Test

Custom Machined 12ga Expanding Copper Slugs -Beta Test

today we’ll be testing out a new shotgun slug from no other than the celebrity machinist tim hamilton of ballistic machinist channel this is a solid copper slug designed to open up when it impacts flesh and also fragment and we call this I don’t know what he’s going to call it working we’re gonna name it won’t even go face boaty mcboatface this first shot was fired at twelve-hundred feet per second what we would call a low-velocity test because this can be loaded up and shot and much higher velocities the slug managed to go through all the gel minute eventually was stopped by the Kevlar best at the end of the table if you look closely you can see a couple of the copper pedals that had sheared off in are now flying independently now the slug was recovered and one of the pedals was also recovered it’s only to the pedals actually shirt off I consulted tim hamilton asking what kind of simple modifications I could do to the remaining slugs that will increase the expansion of them and gave me several options to try we decided to go with the second one simply shampooing the intake of the hollow point given it a larger opening as you can see we also eliminate the steel actuator ball okay anytime once again the slug is traveling at twelve-hundred feet per second but we can definitely see a big problem there as the slug was flying sideways through the air here’s the recovered slug of course no pedals were open no expansion occurred because the slug was flying sideways of course a slug flying sideways or keyholing through a target like that is going to create massive damage to the gel which it did now the reason we are doing low-velocity test is because the loads that were using have very low smoke and very low heat distortion so we can get the best imagery with our cameras here we can see that part of the wadding mostly the shot cup is still attached to the slug itself the slug is flying a little more stable in this shot however it did hit the gel and a slight nose up orientation looking at the damage on the table we can see that the slug partially exited jail block number five and partially entered and sprung back out of jail block number six looking at the recovered slug we have once again have no expansion and none of the pedals were shirt off ok might get bounced back on this one okay hit exactly went off that way though it’s pretty apparent that the slug once again blue sideways in this shot let’s see what happened in high-speed greg was aiming at about a ten o’clock position on the plate and as you can see it hit about the seven o’clock position alright let’s continue with the 50-yard shot man yep I’m ready this one I don’t know where that round where yeah that was those things have some problem they don’t like that are set up although it’s difficult to see in the shot the slug again tumbled through the air and then rather than dropping it actually rose about four feet and then end up hitting the brush behind there another idea that Tim wanted is to try was to actually an eel the copper slug making a little softer and see if that will help with the expansion we also loaded the shell a little hotter and we’ll shoot this at a velocity of about 1,300 feet per second and we will shoot this into our stack of soaking wet magazines ok anytime wallet to it ok anytime the slug went very deeply into this target probably about seven inches into the soaking wet mess of wet magazines the slug was recovered along with two of the pedals that sheared off but once again we didn’t have complete sharing of all eight petals now it should be noted that tim has already done a few tests of his own shooting them throughout fully rifle shotgun at a much higher velocity and he has had nothing but success on his end ok let’s look at the high-speed footage this time with the slightly higher velocity we had better stability flying through the air that slug hit nose-first exactly where greg was a mean even though we had a lot of just flat-out failures on our end with these low velocity tests we did determine that increasing the velocity only helps in this case in a few days Tim will be posting his results of his test using a higher velocity shell and shot through a fully rifle shotgun I’m really excited to see his results so make sure you subscribe to his channel thanks for watching


  1. Hello, i just wanted to ask you how do you make or where do you buy Ballistics Gel or Jel and how much does it cost? And will you make more science experiments not just shooting videos but i also like the shooting videos.

  2. but I'm curious about a rifled choke, I would think all rifling or no rifling, but not.. add rifling at the end of the barrel ? just my opinion what do I know

  3. Hey! I'm a really big fan and love your videos. I was thinking you could test a slug called "Hexolit 32". Very interesting rounds that may give some surprising results. Anyway LOVE your videos this is my dream job.

  4. It will not expand because of the shape of the petals. They actually are pushed in towards the center of the slug. It's basic geometry.

  5. How about a copper end cap fitting filled 15/16" with led ive tiered them threw my smooth boar, never done it with a rifled boar

  6. Could you dip the tip in wax to create a more aero tip instead of the airflow going through the channels causing to tumble. The wax will provide the stability yet, will allow the petals to break away on contact.

  7. hey Jeff I have written you before love the show. I have been thinking of this for a long time. could u try to see how many seat belts could stop a bullet. I know there made out of a heavy material. maybe try regular seat belts or like roll cage ones

  8. Man the new high speed camera has significantly improved the quality of this content, at no previous fault of your own of course, the better image quality and speed just conveys what actually happened so much better and clearly. I love it.

  9. One day you are going to have to do a video on Gregg's many pocket knives. At least once per video you see him use one to dig at something and I don't think I have ever seen him use the same knife twice.

  10. A rubber ball instead of a steel ball tip might work better. That way when it hits contact, it flattens in the front and expands from the sides, thus assisting the expansion of the legs.

  11. hey so, I'm super late to this party, but if someone with the capability were to machine some copper, pellet shaped slugs and then cut the petals into that, would it help with stability?

  12. Proper way to anneal copper is to heat it and quench it makes it almost as soft as lead, heating and air cooling works but not as well.

  13. Could the choke be pressing the petals inward slightly creating metal fatigue that causes the petals to press in/break off instead of spreading? Shoot any without the choke?

  14. I know this video is kinda old and the uploader propably won't see it, but I think that mabe the slugs could be a lot better if they where a little more shaped like the 3D polycarbonate slugs some scientists sent @Taofledermaus
    like smoothen out all the harsh edges and make it more aerodynamic
    perhaps even make some with a solid tip, they should make excellent and accurate penetrating rounds

    maybe if they had holes drilled at the end of the cut for the fins kind of like a breaking point they might end up fragmenting properly

    but the main issue might really be the arrow shape, air at supersonic speeds gets really hard and it should not have any harsh edges that create low pressure areas that make it unstable
    an added feature might be to drill a hole all the way trough the center, kinda like these french wonder "S"
    so what my comment all boils down to is perhaps combining features that worked in the past in to one superslug I guess…

  15. I'll never understand the mentality that glorifies increasing the maiming factor of ammo. "I wanna hurt you more bad before you die"
    Now dont get me wrong, I like to make things go boom as much as the next guy.

    Next you'll want to try explosive heads filled with mercury. If theu don't die from the wound today, they'll die from the mercury within the next year……slowly……painfully

  16. Unless you quenched the slug off camera you actually just hardened the slug.
    Non ferrous act the opposite way to steel and harden when heated and allowed to cool slowly.

  17. I wonder if filling the cavity with wax might improve the aerodynamics, but be soft enough not to impede the round opening up on impact

  18. How about a solid copper or brass non expanding slug with a Lehigh defense xd/xp type design, or has this been done? Loaded for around 1500 fps from a rifled barrel? I am seeing lots of damage in my minds eye.

  19. It may be having stability issues due to the different sectional density from the copper material which would require a different twist rate than a lead slug.

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