Looking at the Powder Burn Rate tables E3 would appear to be a very fast powder ahead of such standbys as Bullseye, Clays and Titewad to name but a few. If you have a chrono and are an experienced reloader, I would normally have some suggestions. Without a lot of experience your best bet is to find another powder. unless of course were considering using it for 12 gauge and just inquiring about it's possible use in the 9 and 45acp.
Take Care
Bob
ps the latest version of Lyman's reloading manual makes no mention of E3 in either caliber.