Author Topic: Duplex ammo  (Read 144 times)

Alan

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Duplex ammo
« on: November 03, 2018, 12:22:51 PM »
For many years, we've have used what I call duplexed-ammo, be that a lead core surrounded by a copper alloy (common everyday, jacketed bullets), or one with a tungsten core for heavy and dangerous game. I know that some pellets are copper plated, but you really can't call them duplexed. This goes for plastic, BB, and brass tipped pellets. But what I've never seen is an honest duplexed pellet! One that is, which has some other material swaged inside the pellet much like jacketed bullets? I do understand the complexity of doing so, but one would think at sometime in the last 200 years, someone would have made them. Know of any?

Oh! And why not saboted bullets in a big bore? Anyone try those?
« Last Edit: November 03, 2018, 12:33:43 PM by Alan »


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Alan

I have an Omega compressor. If you're a fellow Guild member, and you pass through Roswell, NM, I'll fill your portable tank as a courtesy.

rsterne

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Re: Duplex ammo
« Reply #1 on: November 03, 2018, 12:41:58 PM »
Saboted bullets in a Big Bore have certainly been tried, and achieved some remarkable velocities.... Consistency and accuracy is the problem....

Bob
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bnowlin

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Re: Duplex ammo
« Reply #2 on: November 03, 2018, 02:08:59 PM »
What about the copper or plastic pointed Predators, Alan?
Bobn

steveoh

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Re: Duplex ammo
« Reply #3 on: November 03, 2018, 03:19:54 PM »
Saboted bullets in a Big Bore have certainly been tried, and achieved some remarkable velocities.... Consistency and accuracy is the problem....

Bob

I’ve been looking at a 20 gauge sabot mold for my .575 DAQs. Mister Hollowpoint shot some through his .575 DAQ pistol and got decent groups.
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Alan

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Re: Duplex ammo
« Reply #4 on: November 03, 2018, 05:28:16 PM »
Bob, the plastic tipped pellets aren't all that wonderful. The RedFires (PolyMags for .177 by any other name) don't stay together well. I originally bought 10 tins, because they shot very well out to 25 yards in my 397, as long as you pump it at least 5 times (three times, and the shoot like a shotgun!). But out of the 10 tins, about 10% of the tips had fallen out during transit.

I did try PolyMags in four different .25 caliber airguns with mixed results. Part of the issue is the placement of the tip itself. If you rotate them longitudinally, you can see that the tips are not always concentric. Pellets with the brass inserts are a bit better, but not by much. I suspect the tips (unlike plastic-tipped bullets) are inserted after the pellets are swaged.

One thing I would like to see, is a swage press for pellets. Years ago, I has one which used spent 22 rimfire cases as the jacket material for .224 varmint bullets. Pain in the butt to use (you had to pump the hydraulic piston with your foot!), but you could make some fairly decent varmint bullets if you took your time.
  • Roswell, New Mexico
Alan

I have an Omega compressor. If you're a fellow Guild member, and you pass through Roswell, NM, I'll fill your portable tank as a courtesy.

bnowlin

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Re: Duplex ammo
« Reply #5 on: November 03, 2018, 05:55:32 PM »
Yes, I know what you mean.  I bought a bunch a few years back and look at them every so often.  I may take the tips off the 25s and drill a small hole and give them away as Bass worm weights lol.
Bob

PS great bench