270 which powder?

[BudaTx]

I currently load a 140 grain B-tip with IMR 4831. I'm looking to load a 150 grain b-tip but I am short on IMR 4831 and H4350.

I do have "extra" Varget, IMR 4350 and a little IMR 4451. Any thoughts on which powder I should use for the 150 grain b-tip?

 

[DocRock]

Those are both perfectly suitable powders in 270 Win. I have no experience with 4451 and use IMR4831 exclusively in 270 Win but have used IMR4350 in a number of applications and have found it more temp stable at 30F - 90F than we are lead to believe. At temp extremes either end of that, it may very well be a consideration.

 

[Captcurt]

IMR-4350 has been my go to powder for 42 years, but I was pushing 130 gr in 270 and 165gr in 30-06. I have yet to own a gun that liked Varget. R-22 should work if you can find it.

 

[Virginia Jim]

I used IMR 4831 for years in my .270’s, with so-so results. Switched IMR 4350 a couple of years ago with greatly improved accuracy in all my .270’s.

 

[.308 Norma]

IMR 4350 was all I ever used when I was loading for a .270.

 

[EMC45]

IMR 4350 is my go-to for .270 and 7.62X54R

 

[GooseGestapo]

IMR4350 has been good for me too. But so has both 4831’s and H414. The 4451 is an attempt to produce a newer and cheaper (environment friendly manufacturing) version of 4350. It should work well. It’s too new for widespread knowledge/experience.
Fastest velocities I’ve recorded have been with MagPro. 3,200 with a 130gr.

 

[reloaded_in_pa]

4350 is my primary 270 powder.