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: 2349 Related products IMR Powder – 4198 1lb $50.00 Add to cart IMR Powder – 4320 8lb $240.00 Add to cart IMR Powder – 4064 1lb $45.00 Add to cart IMR Powder – 4831 8lb $250.00 Add to cart