Go to the Hodgdon website. Look at the reduced loading for H4895 ONLY. Go to the 405Win part of the site. See the 405Win MAX LOADS USING H4895 ONLY. Reduce those by 60% as per Hodgdon reduced loads using H4895 ONLY.
I do this all the time with different chamberings. Works great. Follow the Hodgdon directions exactly. --- SAWMAN