Which burns faster, H322 or IMR 3031?

H322 is the faster-burning of the two (rank #52 vs #56 — lower rank burns faster).

Powder head-to-head

H322 vs IMR 3031

FastestSlowest

Similar burn rate zone; within 3–5% charge weight.

Confidence: Published. Always start at published minimums and work up.

Can I substitute H322 for IMR 3031?: Similar burn rate zone; within 3–5% charge weight. Confidence: Published. Always start at published minimum charges and work up.
Which burns faster, H322 or IMR 3031?: H322 is the faster-burning of the two (rank #52 vs #56 — lower rank burns faster).
What cartridges do H322 and IMR 3031 both load?: Both powders are listed for .222 Remington, .223 Remington, 6mm BR Norma, .444 Marlin, .38-55 Winchester, 6.8mm Remington SPC.