[Dom]

Since I haven't shot your rifle I can't give exact loads, but powders that have given excellent & accurate results in the past are:
Win. 760/ H-414 ( same powder different label ) & IMR-4350.

 

[Dom]

300Win

For some unknown reason Win760 and Win748 are just not available. I have spent hours checking gun shops around the country to no avail but if H 414 subs, then I'm in clover.

Hey SUS. Your in clover. Win.760 & H-414 same powder, different label. Go for it.

 

[Dom]

I have two current burning rate charts one from Hodgon. They both show Win, 760 & H-414 one right after the other. I have been using both these powders in my 30-06,300 H&H, & 300 Win mag. for 30+ years. The two powders have always been totally compatible & are within + or - 1gr. This is right in line with lot to lot variations of any powder. But as always every rifle is different & loads should be worked up from a safe starting point. Hodgon also does this same switch like Win.540/HS-6, Win.571/HS-7, Win.296/H110. Other companies do this same practice we just don't know it. Hope this has been of some help.

 

[Dom]

I have thought of using the IMR 4350 but not sure how well it works in climate or altitude change.

Hey there Biggie d. I live & shoot on my own range at an elevation between 7600' & 7700' . Have shot & chronographed many powders in various cal's with no problem. That includes all of the various 4350's. I have shot these loads at lower elevations & higher with no problems. These loads have been shot in summer weather & very cold winter hunting situations. No problems. Hope this helps a bit.

 

[Dom]

Thank you it all helps I live in Indiaina but am going to be hunting in Colorado so I was concerned about the change.

If you have a rifle with a wood stock where the barrel is bedded against the wood this can be a problem. Wood likes to move around with changing elevations & moisture conditions. This moves the barrel, sometimes a lot. Under this situation free float the barrel. If your barrel is already free floated your in good shape. But "No Matter What" as others have said recheck your zero after you arrive.