Home / IMR / IMR Powder – 4831 1lb IMR Powder – 4831 1lb$40.00 IMR 4831 1lb 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. 1lb IMR 4831 Powder IMR Powder - 4831 1lb quantity Add to cart Category: IMR Product ID: 2246 Related products IMR Powder – 4320 8lb $240.00 Add to cart IMR Powder – 7828 SSC 1lb $50.00 Add to cart IMR Powder – 8133 1lb $40.00 Add to cart IMR Powder – BLUE 1lb $30.00 Add to cart