I have loaded up to 58 grains of h4831sc in my 280 and was wondering if anyone has gone higher than that? I am sticking with the 140 Ballistic Tip and get around 3,000 fps now but think I could maybe hit 3,100 and still keep the accuracy. Right now I am at the max loads in my manuals but do not have any pressure signs. So is it possible to go higher with this powder?

Hi PT
ADI in Australia makes H4831sc, in oz it's named AR2213sc.
In the ADI Handloaders guide they have

140gn 58.5gns for 2927ft/sec(24"barrel) as a max load
for what it's worth.

Regards
Deafdog

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deafdog@turboweb.net.au
http://deafdog.turboweb.net.au

I have found each .280 that I have owned (3) to be very different in max. loads for the 140 gr Nos. B-tip, particularly with IMR4350. I think that you are near the max., but you are on your own over 58 grains.