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I'm in for two 3 cavity HP NLG flat base molds. Plus two pairs of handles.

dh03021991 at gmail dot com

As allways, great group buy option!
Thanks a lot!!!

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No, but they make perfectly round holes, at least when shot trough the conventional match barrel.

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The problem I am trying to solve is: Why do my .309 zinc bullets going at 920 m/s work and my .224 zinc bullets going at 1090 m/s do not.
As a stated in my original post my very fast 308 loads do...

I tried PPU 45 gr jacketed bullets with the same load, they worked just fine.
It seems pure zinc is still to soft for the bullet (3 driving bands) with full loads.
I tried the zinc 45 gr zinc...

As I said they work perfectly fine in my 308 Winchester at over 900 m/s. 2 cm at 100 m.
The 224 and 309 diameter bullets are even completely the same design, the 224 is just shrunken in all...

I recently tested my zinc 223 Rem loads.

As I posted above I sized the bullets to .224.

I shot them out of a HK SL6 which has about a 11" twist rate and polygonal rifling.

Accuracy was...

I recently tested my zinc 223 Rem loads.
As I posted above I sized the bullets to .224.
I shot them out of a HK SL6 which has about a 11" twist rate and polygonal rifling.
Accuracy was horrible,...

Thank you for your comment 303Guy. I think it is always advisable to pay attention to perfect ventilaton when casting. There are masks for filtering zinc oxide smoke from 3M and the like.[emoji4]But...

I present you the exploits of my zinc casting session. Allready lube (only to facilitate sizing) and sized.

44 RNFP sized to .430 zinc 165gr...

I do use to different pots. A Lyman Mag 25 for lead, and my special furnace for zinc.
As we all know at normal "lead casting-temperatures" zinc in your lead results in a rather mushy consistency. (I...

I sort the wheel weight I get from the auto repair shop before I melt them. In Germany they are primarily made of zinc, there are some iron wheel weight in the mix, and very very few lead wheel...

It's not due to unnecessarily high temp of the pot.
For some time I cast with a normal Lee Pro 4-20 pot that had just barely enough power to melt the zinc (when temperatures got lower in autumn and...

Due to the immens thermal capacity of zinc that's not necessary, most of the time you have to wait for the zinc to solidify if your not using multiple molds.

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As zinc seems to flow better than lead, less surface tension I guess, the bullets come out very evenly. Their weights are all between 105.5 gr to 107.0 gr for the hollow points, and that's including...

The pot its self is made of 3mm stainless steel, although it won't hold up forever, it does corrode and it will fail, that's why I designed my furnace to be easily disassembled to change the melting...

Technically speaking the expansion coefficient of zinc an lead are pretty close. Lead 28,9x10^-6/K and zinc 30,2x10^-6/ K.
I size them as I size my lead bullets. I've cast lead and zinc bullets from...

That "explosion" of the frontal part of the bullet musst be credited to the hollow point. It's possible to change the way the bullet tip by changing the form (depth and width) of the hollow point. A...

I was thinking about casting some zinc slugs, as I have a brass two cavity Lyman stile mold from MP-Molds.

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@Traffer thanks a lot!
Casting is just such a cool hobby, with slot of room for experimenting. It's always fun to have someone to talk about that geekery. 8-)

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I got my brass molds from MP-Molds. There are group buys in here regularly.

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I normally work with three molds when casting those zinc bullets. That's enough time for the zinc to solidify and still easy enough to cut the sprues. If you wait until the zinc is completely cold it...

I load my 110gr zinc 308Win with 45gr of N140. Should push it to about 900 m/s = 2700 ft/s.
I'll attach photos of the 308 HP bullet after firing at gelatine block.
You can see the hollow point...

I tried powder coating the zinc bullets just for fun, but zinc doesn't lend its self as good to powder coating as lead does. Powder wouldn't stick an bullets came out horrible after baking. The...

No gas check needed. I size with cheap Lee push through sizers. Lubing the bullets before sizing makes that process a lot easier of course. As it gets rather hard to push a 30+ bhn bullet through a...

About 63% of your 95gr lead projectiles, so about 60gr. You American guys know basic physics, like different densitys of different elements and stuff right?[emoji848][emoji6]

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