257 AI powder suggestions

[284allways]

I am running out of my preferred powder AA3100 and looking for a replacement. Does anyone have recommendations based on use ? I will be loading the 110 gr AB

 

[SJB358]

I’d probably take a decent look at R22, 23, 26 and the similar IMR and H variants. RL22 and similar should make great speed for you. Good luck and post up what you get.

 

[1Shot]

Back when I was using AA3100 in a 7 Rem mag it ran about the same as H4831. Jump forward a decade or so with different powders these days and I would take a long look a Retumbo. People with a regular 25-06 and 257 Weatherby have had great results with it. It sure makes my 264 Win mag scream with great accuracy.

 

[preacher]

My only dealings with the 257 AI was back in early 80's. I used IMR 4350 and the old Hornady 120HP. Being young and dumb, and since that rifle had a long throat, I was able to use Ackley's 'top load" for the 120! No chronograph then, so Lord only knows...

 

[cloverleaf]

Where is "257 Ackley"? Joel would have some good ideas. Perhaps a search for his posts would turn something up...? CL

 

[steve99]

I had a 257AI about 10 years ago. Of all the appropriate powders tested, and I tested most, H4350 and RL22 were the powders which performed best with bullets from 85gns -120gns.

 

[steve99]

I had a 257AI about 10 years ago. Of all the appropriate powders tested, and I tested most, H4350 and RL22 were the powders which performed best with bullets from 85gns -120gns.