What does bullet mold mean?

bullet-mold. An implement containing a cavity of the proper shape into which lead is poured to form a bullet.

What are bullet molds made of?

Traditionally, bullet moulds have been made out of iron or brass, and more recently aluminum has become popular as a result of its availability, ease of machining and high thermal conductivity.

Is brass or copper bullets better?

Copper is softer and is also lead free for areas requiring non lead hunting. Copper tends to be a little higher BC than brass. Brass also tends to break up a little more violently than copper. Brass also tends to be better for your barrel and almost has a cleaning effect.

Why are bullets coated in copper?

The surface of lead bullets fired at high velocity may melt due to hot gases behind and friction with the bore. Because copper has a higher melting point, and greater specific heat capacity and hardness, copper-jacketed bullets allow greater muzzle velocities.

Do you lube bullets before sizing?

Bullets can be sized after they have been lubed. However, for best results, we recommend bullets be re-lubed after sizing to be sure the sized portion is coated with Lee Liquid Alox. Bullets must be sized if they are so large that they expand the case too much to freely enter the gun’s chamber.

Why are bullets coated in brass?

Brass is more accurate than other bullets, due to its better seal on the chamber and creates less fouling. The main disadvantage of brass bullets are price, for those who are willing to buy bullets in the budget then it is going to be more expensive.

Why do bullet moulds have lines on the inside?

All modern moulds have tiny little lines cut into the internal faces that act as vents to allow air to escape the mould as molten alloy is poured in. Without these vents the air becomes trapped in the mould and prevents 100% bullet fill out.

How do you remove burrs from bullet moulds?

First, take a magnifier and inspect the edges of the bullet mouldcavities for any obvious burrs. These,in the case of an aluminium mould, can easily be removed with the careful useof an art knife or scalpel – precise work and not for those with shakyhands.

How do you remove rust from a bullet?

For rust in the bullet cavity the best removal is to polish it out by coating a bullet in very fine abrasive compound and rotating the bullet in the mould. Take a bullet and place it in the mould and via the hole in the sprue plate drill a centred hole in the base of the bullet.

What size bullet for 32-20 Martini mould?

I have a Lyman 311008 double cavity mould for my .32-20 Martini. Some years back the mould started producing bullets that were far from round. In on dimension the bullets measured .310 inch and 90 degrees to this .315 inch.