338 Win Mag, IMR 445

msilbernagel

Active Member
Joined
Feb 14, 2021
Messages
27
Location
Clark County, Washington
Hello Everyone,

I'm working with my son-in-law to work up a load for a 338 Win Mag, with Hornady 200gr SST bullets.

Naturally, finding the power you'd like can be challenging - but I do have an unopened 8lb container of IMR 4451,

Challenge is - Neither Hogdon nor Hornady offer information on loads using that powder, though the H4350 and IMR 4350 seem like good choices in their load data.

Scanning forums and previous posts I find little that seems definitive. So - here's my question:

How close are H4350 and IMR 4451? A few have mentioned using IMR 4451 as a replacement but weren't clear on exactly how close it comes.

From what I have read, and lacking hard data, I am inclined to do ladder tests using the H4350 min/max, work up to Max watching for pressure signs, and monitoring velocity with the magneto speed. Thoughts / comments on this notion?

Any favorite loads using that bullet or something close?

This doesn't seem like a popular / common enough cartridge.. so good load data seems scarce.

Thank you

Mark
 

Recent Posts

Top