I load a bunch of other calibers and will start working up something for my No4 Mk1 soon. This rifle has a real strong bore and should (I hope) do well with a 150gr SP bullet. Due to the fact I am a noob at the 303 My biggest question is powder. I am an accuracy nut, but realize there are limitations to this package. So, where do y'all suggest I start?

Thanks in advance!
Information
Warning: This is a relatively older thread
This discussion is older than 360 days. Some information contained in it may no longer be current.