dropping hot cast bullets in water quench

grumpyvette

Administrator
Staff member
If you start casting bullets regularly youll find , as your speed picks up, that you must wait for the SPRUE, or over-fill lead on the molds cut-off plate to change appearance as it cools before you open the mold to allow the bullet to drop out or the bullets deform as they are still semi hard ,the lead alloy doesn,t fully get solid for a few seconds after the mold releases them, in fact that they normally come out of the mold rather soft and easily deformed for the first few seconds,if you cast bullets as rapidly as possible, dropping them on a soft cotton towel reduces the deformed culls , that get damaged while dropping, that might hit previous cast bullets but theres an option that works better. dropping hot cast bullets in water quench both cools and reduces the impact velocity as they reach the bottom of a bucket youll use but Ive found the less common and taller 7 gallon buckets with both a taller column of water and greater mass seems to work better than the more typical 5 gallon bucket.
a typical 5 gallon bucket holds about 4 gallons of liquid and the bullets fall thru about 18" of water , the taller 7 gallon bucket adds at least 6"-8" more cooling distance and on larger 300-500 plus grain bullets this seems to help reduce culls)scrap quality bullets cast) and allows you to cast a bit faster.
water quench also tends to make some alloys with tin and antimony harden and work better.
http://www.lasc.us/CastBulletNotes.htm
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358-171-gc.jpg

this nei design works well in my brother in laws marlin 357 mag carbine


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the 5 gallon buckets not as effective in my experience as the taller 7 gallon buckets
 
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