Powder for the 280 Improved

[chad]

Which is the best temp stable powder for the 280 AI?

 

[cowboy]

Which is the best temp stable powder for the 280 AI?

What is the twist in your barrel and what weight of bullet are you referring to?

 

[clambdin]

I have had good luck with H4831SC in mine..

 

[chad]

its a factory Remington 280 barrel im rechambering. I believe its a 1-9 twist. Im looking between the 140 grain bullet and 168

 

[cowboy]

its a factory Remington 280 barrel im rechambering. I believe its a 1-9 twist. Im looking between the 140 grain bullet and 168

On the 140's - I have no personal field proven experience
On the 168's - H4831sc but don't rule out Retumbo (it will be a slightly compressed load)

 

[chad]

What was your velocities and how long was your barrel?

 

[cowboy]

What was your velocities and how long was your barrel?

2 different rifles both finished @ 25", field verified at 3400 ft. elevation and 40F, 1-10 twist

H4831sc - running at 2840 fps w/168 berger VLD
Have been higher velocity but this is where my field verified accuracy was
at it's best

Retumbo - 2950 fps (different rifle) from H4831sc w/168 Berger VLD

Work loads up gradually as all rifles/barrels are different.

Not questioning the above response but I would be surprised if a factory 280 Rem would come with a 1-9 twist.

 

[DocDoc]

Actual twist for current 280 Rem factory is 1 in 9.25.

 

[MudRunner2005]

I have been shooting IMR 7828 SSC in my .25-06 Ackley Improved (and several other Ackleys) and it's working great. Excellent velocities and seems to be very temp stable in several of my other calibers as well.