View Full Version : Alloy mix .458 Socom 1800 fps powder coated
Dadswickedammo
01-21-2018, 02:49 PM
Hey fellas got my dies brass molds now time to cast.
Casting 2 size
457 bullets 340&405gr will be powder coating running 1500 to 1850fps 18" barrel using lil gun and imr 4227.
I have pure lead a **** ton of linotype and tin.
Looking for a guide line on alloy mix.
Thinking around 5% antimony 4% tin 91% lead. That's my best guess.
Any advise??
Thanx
xdmalder
01-21-2018, 04:55 PM
2.5% tin. 2.5% antimony. 95% lead
Dadswickedammo
01-21-2018, 07:58 PM
Sweet. Thank you
From the Rotometals website-
BHN = 8.60 + (0.92 * Antimony% ) + (0.29 * Tin%)
91/5/4 = 14.4 BHN
95/2.5/2.5 = 11.6 BHN
Smoke4320
01-22-2018, 11:13 AM
95/2.5/2.5 = 11.6 BHN would work great in a big 300-350 gr bullet
I shoot a 325gr HP with a 48/48/2 CCWW, PB, HSB alloy very accurately at 1600 FPS . real deer killer
according to my alloy calculator this yields a 9.9 BHN
use it in 300 Blackouts going over 1900 FPS, 45/70 at 1575 ect ect
John Boy
01-22-2018, 12:17 PM
Looking for a guide line on alloy mix.Lyman #2
Smoke4320
01-22-2018, 01:04 PM
for a very good alloy calculator
http://castboolits.gunloads.com/showthread.php?105952-Lead-alloy-calculators&highlight=lead+calculators
Dadswickedammo
01-31-2018, 11:57 PM
Very helpful thanx
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