Which burns faster, N170 or Retumbo?

Retumbo is the faster-burning of the two (rank #78 vs #78 — lower rank burns faster).

What cartridges do N170 and Retumbo both load?

Both powders are listed for .338 Lapua Magnum.

Powder head-to-head

FastestSlowest

N170 #78 · Retumbo #78

Similar burn rate for ultra-magnums; reduce 4–6% when substituting.

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

Can I substitute N170 for Retumbo?: Similar burn rate for ultra-magnums; reduce 4–6% when substituting. Confidence: Community. Always start at published minimum charges and work up.
Which burns faster, N170 or Retumbo?: Retumbo is the faster-burning of the two (rank #78 vs #78 — lower rank burns faster).
What cartridges do N170 and Retumbo both load?: Both powders are listed for .338 Lapua Magnum.