Thanks for the additional insight and experience; helps alot. I reckon I'll try the 3031 I have now and look at getting some 4198 when I buy the next jug of 4831.

I expect he'll be into regular loads within a year, but he's got two more coming up behind him, so the experience will be well worth the time. I'll be doing the same thing for a .280 very soon. Besides, experimentin's fun!