I am looking for load data using 440gr Cast performance bullet, alliant 2400 powder, in the 458 win mag for light loads. any suggestions. I have also emailed Alliant and am hoping for a reply.

I worked up some excellent loads in the 458win mag using 28 grs of 2400 with a dacron filler to the base of the bullet.Make sure you leave no airspace and that the dacron is compressed. I found that this load would work with nearly any bullet from 300 grs to 550 grs as long as it was .459 inch in diameter and most importantly cast from pure Linotype. I spent 4 months developing this load and tried multiple lead alloys. Only Linotype works.
Try it you will like it.-Rob

Hi john I have not used teh 2400 but
15 grains of Red Dot with no fillers
for my light load (1115ft/s). Bullets from Lee's 450gr mold, cast from wheel weights, 5 shots 2" at 100m
PerN

thanks for the replies. I picked up the Alliant reloading booklet. the 385gr bullet was loaded with 30.0gr of 2400 and a 500grFMJ was loaded with 35.0. I was thinking that loading a 440gr hardcast with a charge of 30-35gr of 2400 would be a good place to start. Have not heard from Alliant yet. just looking at the load data for the 2400 powder it appears like it is very easy to play with if you are working on light loads. I think that if I were to run the 440gr bullet in the 1500 f/s range it should be good. any thoughts on how safe it is to experiment with the 2400 powder for light loads......seems like what I have read from other posts that this powder is very easy to work with .

One thing I like about 2400 is it's safe to download it. I haven't used it in the 458 win mag, but have played with it a bit in the 35 whelen. I would have no quolms about starting at 15 grs for a ~1000-1200 fps load, and working up. It will be dirty, but it should also be accurate. IMHO, 2400 is the best powder for mild cast bullet loads in rifles.