4064 vs H335 vs Varget

[mapper]

A lot will depend on the grain of the bullet you are loading.
I have good sucess with varget in 223 with 77 gr,
Does that mean its best for 50-55 gr,
Myself, id pick a faster powder for the lighter bullet,
335, blc2,4198, even though there are loads for varget in it.

For 243/6mm I have had good auras with 4064 in the 75-90 gr range.
I wouldn't mind trying it in 168-175 gr 308, or 77-80 gr 223 loads.

Burn rates are a general guide, and not a chiseled in stone thing,

While I like the sierra load book, they do not pressure test their loads.

So I guess as my final answer, a definitive maybe.
Start on the low/middle end and work up, your rifle will tell you what it likes or does not.

If you want to try a little diffrent powders,
I have the 3 you mentioned.

Edit:
Just found this, it is a good read about powder speed, case capacity and sectional density.
http://kwk.us/powders.html