Powder head-to-head

H4350 vs Reloader 17

Burn-rate position

FastestSlowest

H4350 #66 · Reloader 17 #63

Substitution

RL-17 runs higher pressure than H4350 — reduce 5–8% when switching to H4350.

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

Side by side

H4350Reloader 17
ManufacturerHodgdonAlliant
Burn-rate rank#66#63
Burn categoryRifle MediumMedium-Slow
Grain shapeExtrudedExtruded
Temp sensitivityLowModerate
ApplicationsRifleRifle
Suppressor-friendlyNoNo
US availabilityCommonCommon
StatusActiveActive

Shared cartridges

FAQs

Can I substitute H4350 for Reloader 17?
RL-17 runs higher pressure than H4350 — reduce 5–8% when switching to H4350. Confidence: Community. Always start at published minimum charges and work up.
Which burns faster, H4350 or Reloader 17?
Reloader 17 is the faster-burning of the two (rank #63 vs #66 — lower rank burns faster).
What cartridges do H4350 and Reloader 17 both load?
Both powders are listed for 6.5 Creedmoor, .308 Winchester, .30-06 Springfield, 7mm-08 Remington, .270 Winchester.
PowderH4350 in fullPowderReloader 17 in full