light loads for 458 win mag

[bullzeye]

anyone have any data for light loads for 458 win mag?
for now i have a lee 340 gr mould but want info on any weight of bullet.
will buy more moulds if i like the data.
would like data to equal 45-70 loads for a springfield rifle as an example.
just looking for something that won't bust my shoulder at the bench.

 

[Andy]

Here are a couple of mild loads that will give you about 1500 fps with that bullet:

Unique - 20.0 grs
SR-4759 - 30.0 grs

You could also try up to 22.0 grs of Trail Boss, but you'll only see about 1200 fps.