Vetterli

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  • Last Post 06 October 2015
waltherp88 posted this 28 September 2015

I just received my new mold from Accurate for my Vetterli ,as suggested by members.  I also received as a gift 28 pounds of lead ingots with 5.5% antimony.  I was wondering if this was the correct mix to use or what mix should I be using?  I plan to load them as I have loaded the pre cast with 19 grains of 5744 powder, chronographed at ~1084 ft. per second.  Any help would be very much appreciated as usual.

 

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onondaga posted this 28 September 2015

http://castbulletassoc.org/view_user.php?id=8054>waltherp88

Your 5.5% Antimony alloy is BHN 13.66 by formula.  Commercial cast bullets are generally BHN 16-20.

So, your alloy is appreciably softer than commercial cast. I suspect it will be just fine with your 5744 load but it will likely have a different point of impact. So, re-sight in.

Gary

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Ed Harris posted this 28 September 2015

You did not indicate whether you intended to shoot black powder or smokeless in your Vetterli. For the purposes of selecting a proper alloy, at the low velocity you are seeking, it probably makes little difference. You do not need, and probably do not want a hard alloy at blackpowder velocities below about 1300 fps / ~400 m/s. A hardness of 8-10 BHN is entirely suitable.

Basic Rules for Hardening Lead:

For every 1% additional tin, Brinell hardness increases 0.3. For every 1% additional antimony, Brinell hardness increases 0.9.

For a simple equation,

Brinell = 8.60 + ( 0.29 * Tin ) + ( 0.92 * Antimony )

73 de KE4SKY In Home Mix We Trust From the Home of Ed's Red in "Almost Heaven" West Virginia

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Ken Campbell Iowa posted this 28 September 2015

in my experience in shooting old guns with plain base bullets at about 12-1400 fps with smokeless ... you could extend your alloy by mixing it 50-50 with softer lead ... i have shot a lot of unhardened 22 rf backstop lead in old 32-40. 38-55 etc .... of course the catch is if you have to buy mixing lead at $2 per lb. it kinda becomes a financial puzzle ....

ken

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waltherp88 posted this 06 October 2015

Sorry for the delayed thank you. That is exactly what I wanted to know. Thanks again.

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