These lead cast bullets are made from 92-6-2 alloy and are then coated in Polymer Bullet coating. The benefits to shooting are numerous and include: The coating creates a molecular bond to the bullet totally encapsulating it. Coating prevents lead to bore contact. Much less smoke compared with traditional lubed bullets and has less friction than jacketed bullets so velocities will 5%-10% faster. We use a special lubricant during the sizing process to prevent the slippery, slimy feel. Standard sizing is .356. Custom sizing is available.