IMR 4064 ????

[liltank]

Can anyone give me an opinion on IMR4064 temp stability. It was a staple for our family in 270 and 243. That was long befor I became edumicated about powders. IMR really doesn't say much about it on there website. Thinking about that route with 168's in my .308.

 

[masterblaster1]

It will work if you are talking 308. It works quite well actually, I have gone back to it when I got tired of looking for Varget, I forgot how good this powder was.

 

[logger3006]

I run 50grns of it with 165 btsp in 30-06. It shoots holes in holes winter and summer.

 

[watercam]

Same here. So far it is duplicating my Varget loads grain for grain in two calibers with same accuracy and very close SD numbers. I never thought Varget was totally temp tolerant to begin with. When I developed loads in the low-to-mid- 60s temps. and then shot a match in the mid-80s I found I needed to drop the loads at least .5 grain if not more. Same with IMR and Reloader powders. I am good with that and plan accordingly. It's liberating!
Now, about the new IMR powders and THEIR super-temp tolerance...

 

[liltank]

Same here. So far it is duplicating my Varget loads grain for grain in two calibers with same accuracy and very close SD numbers. I never thought Varget was totally temp tolerant to begin with. When I developed loads in the low-to-mid- 60s temps. and then shot a match in the mid-80s I found I needed to drop the loads at least .5 grain if not more. Same with IMR and Reloader powders. I am good with that and plan accordingly. It's liberating!
Now, about the new IMR powders and THEIR super-temp tolerance...

Those are my thoughts as well. :

 

[Jet]

It is my go to powder for the .308 Win with 168 and 175 gr bullets. I've only used it between 40-80 degrees and never experienced pressure signs at these temps.

Good Shooting

Rich

 

[BCoates]

I use IMR4064 for my 168 SMK 308 Win load. I find that if I increase or decrease my load 0.1 gr/10° F the velocity will stay almost identical between 40° and 90°.

 

[liltank]

I use IMR4064 for my 168 SMK 308 Win load. I find that if I increase or decrease my load 0.1 gr/10° F the velocity will stay almost identical between 40° and 90°.

That's interesting info.

 

[wyoming .260]

Isn't there a new IMR powder close to 4064 .....IMR4166 that is suppused to be stabile and have CFE properties..... I seen it was in stock some where.

 

[liltank]

Isn't there a new IMR powder close to 4064 .....IMR4166 that is suppused to be stabile and have CFE properties..... I seen it was in stock some where.

Don't know about the CFE properties or burn rate. According hodgdons site, it is slower in velocity than 4064. That might be a slower burn rate then.

 

[CatShooter]

IMR 4166 is the same speed as 4064 - if it does have small granules, then it will be a winner, cuz the granules of IMR 4064 are the size of tooth picks and real hell to run through a measure.

 

[jim_k]

It is one of the most temperature-stable powders.
Jim