Trying something

jimbobborg · Sep 11, 2020

I can't find 458 WinMag brass and I'm not paying $120 for 20 rounds of ammunition. So I find out that cabela's has Herter's 300 WinMag ammunition for $1.20 per round. I picked up 120 rounds of ammunition and I'm going to fireform them to 458. Let's see if this works. Going to the range on Monday to start the experiment.

85MikeTPI · Sep 12, 2020

Why not just just new or once fired 300winmag brass and expand it up to 458? I'm not saying your idea won't work, but there's a Darwin award for a reason..

https://www.mdshooters.com/showpost.php?p=3648253&postcount=1

Here's a link of DIY using small pistol charge and packing, not the full power factory loads and a 30cal projectile of death bouncing down the barrel...

http://castboolits.gunloads.com/showthread.php?155808-Fire-forming-brass

Rockzilla · Sep 12, 2020

if you do FB once in a while (like me) Check out Mark Jackson ( The Handloading Center (group) ) He had a "bunch" 458 WM stuff brass, bullets
that he's selling from his Grandpa.... he may still have it or some. I had to pass on it, had other things arriving, was not really "needed"
I run across all kinds of brass in my travels, (no I don't sell it) odd ball stuff, last bunch was 22 Hornet (New), 45 Win Mag.(New)...etc.

-Rock

Jerry M · Sep 12, 2020

I am pretty sure I have some .458 Brass that I loaded then pulled the bullets. If you are interested I'll see how much I have.

Let me know.

Jerry

John from MD · Sep 12, 2020

jimbobborg said:
I can't find 458 WinMag brass and I'm not paying $120 for 20 rounds of ammunition. So I find out that cabela's has Herter's 300 WinMag ammunition for $1.20 per round. I picked up 120 rounds of ammunition and I'm going to fireform them to 458. Let's see if this works. Going to the range on Monday to start the experiment.

Pull the bullets and fireform with 10 grains of bullseye, fill case with corn meal and cap with a drop or two of Bordens white glue.

If you shoot the high pressure rounds, the case may split.

jimbobborg · Oct 6, 2020

John from MD said:
If you shoot the high pressure rounds, the case may split.

I tried this anyway just to see what happens. I got one good case and split two. So, I'm going to go ahead and shoot the rest out of my Remington and anneal the brass. Then I'll do it properly. Sadly, no Bullseye to be found near me, and I'm not ordering one pound of powder.

John from MD · Oct 6, 2020

jimbobborg said:
I tried this anyway just to see what happens. I got one good case and split two. So, I'm going to go ahead and shoot the rest out of my Remington and anneal the brass. Then I'll do it properly. Sadly, no Bullseye to be found near me, and I'm not ordering one pound of powder.

You can use any fast powder. Red dot, Clays, AA#2 , Clay Dot, Titewad, Hi
Skor 700X they will all work.

Trying something

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