Home / IMR / IMR Powder – 4831 8lb IMR Powder – 4831 8lb$250.00 IMR 4831 8lb Powder IMR 4831 has a slightly slower burn rate speed than IMR 4350. It provides top velocities and performance with heavier bullets in medium-sized magnums. IMR Powder - 4831 8lb quantity Add to cart Category: IMR Tags: 4831 8lb, IMR Powder, IMR Powder 4831 8lb, IMR Powders, Powders Product ID: 2247 Related products IMR Powder – BLUE 1lb $30.00 Add to cart IMR Powder – 4227 1lb $45.00 Add to cart IMR Powder – 4451 1lb $40.00 Add to cart IMR Powder – 4227 8lb $250.00 Add to cart