What is the best lead for bullet casting?
One of the hardest and most accurate alloys for casting bullets is linotype metal, which is 4 percent tin and about 11 percent antimony. It can be bought at some print shops or as scrap. It is usually a good bit more expensive than scrap lead, but it makes great bullets if you want top accuracy.
Can lead be hardened?
Water quenching (dropping bullets straight from the mould into a bucket of water) will harden your lead, antimony, arsenic alloy but as the lead pot and mould temperature varies so does the final hardness of the bullets. Additionally, you get what you get (about 15-19 BHN with wheel weights).
What are hard cast bullets made of?
lead
A cast bullet is made by allowing molten metal to solidify in a mold. Most cast bullets are made of lead alloyed with tin and antimony; but zinc alloys have been used when lead is scarce, and may be used again in response to concerns about lead toxicity.
Does water quenching Harden lead?
Do you really need or want a 30 BHN bullet? Water quenching (dropping bullets straight from the mould into a bucket of water) will harden your lead, antimony, arsenic alloy but as the lead pot and mould temperature varies so does the final hardness of the bullets.
Can lead be cold worked?
Zinc, tin and lead have recrystallization temperatures below room temperature. This means that these metals cannot be cold worked at room temperature since they crystallize spontaneously, reforming a strain free lattice structure.
Does lead strain harden?
The absolute melting point of lead is 327.4°C (621.3°F). Therefore, in applications in which lead is used, recovery and recrystallization processes and creep properties have great significance. Attempts to strengthen the metal by reducing the grain size or by cold working (strain hardening) have proved unsuccessful.
What’s the difference between a hard cast and a soft cast?
A cast, which keeps a bone from moving so it can heal, is essentially a big bandage that has two layers — a soft cotton layer that rests against the skin and a hard outer layer that prevents the broken bone from moving.
