IMR 4064 in .458 win mag

[antiqueguy]

Anyone have data for IMR 4064 in .458 win mag all I can find is for 510gr bullets. I’m trying to load some of the 350gr bullets I have just to shed what I can achieve for accuracy only have about 30 primed brass.

 

[4fifty8]

I use IMR 4064 with 500gr bullets for my .458 WM works pretty good Lyman Cast Bullet Handbook lists IMR 4064 loads for 292 & 385 gr bullets my other loading manuals don't list IMR 4064 / 350gr maybe could interpolate?

 

[antiqueguy]

I use IMR 4064 with 500gr bullets for my .458 WM works pretty good Lyman Cast Bullet Handbook lists IMR 4064 loads for 292 & 385 gr bullets my other loading manuals don't list IMR 4064 / 350gr maybe could interpolate?

I might grab a different can of powder I have 4064 on hand for .303 and x54r mainly

 

[4fifty8]

IMR 4064 might be a tad slow for efficient burn with 350gr bullets haven't tried it would expect some unburnt powder. Re7 works great with 350gr.

 

[antiqueguy]

I think I can get that locally I will have to get some and give it a shot.

 

[saskgunowner101]

I have data from a lyman book showing 62 min-70 max (compressed) of IMR-4064 with a 385 grain bullet. It would probably work alright even though it's kinda slow for the 458 WM.