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Discussion in 'Reloading' started by chad, Mar 24, 2014.
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?
I have had good luck with H4831SC in mine..
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)
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.
Actual twist for current 280 Rem factory is 1 in 9.25.
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.