by No1Mk3 » 16 Jan 2016, 6:57 am
G'day snag,
Do you have a lever action or a bolt action? For the lever, the ADI data bentaz pointed out is a good, low pressure/velocity starting place. I used to have a No4 LE chambered for this, as well as a Martini, and used to load 34.0g of Du Pont IMR4320 for 3400fps using 55g PSP in the Martini, never chronied the Enfield. If you have a projectile in mind, I have access to a load database that includes this cartridge and could find some more info for you, Cheers.