best 280 AI powders

[Brad1974]

I’ve have good results with H4350 using 150gr cx bullets. 0.5” groups out of a 22” barrel.

How are your SD's &/or ES? It looks like H4350 only gets in the 86-87% case fill range, which is slightly lower than I thought was ideal. But, if it works, it works. Also, what velocity are you getting from a 22" barrel?

 

[Brad1974]

IMR4831, IMR 4451 shoot tiny groups out of my 280AI. 140GK up to 168 Bergers. 145LRX likes the 4451. It's probably the easiest cartridge to load for. They aren't super picky from what I've seen.

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Yea, I just noticed IMR 4831 looks like it could be a good option too., since It burns a little faster than H4831sc does. Have you noticed any issues with temperature sensitivity? How are your velocity, & SD/ES?

 

[wyoguy]

RL23 was unstable for me. 4831sc and recently have tested some 6.5 Staball with good results