Probably the best way for you to go is drop a chargethat's a bit light and trickle the rest onto the scale. As an example, let's say your charge is 30.0 gr. of whatever powder you're using, in this case 3031. Set your measure to drop maybe 28.5 gr. and trickle the rest to bring the charge up to the specified level.
That's one way, but if money is no problem (yeah right.
) Get the RCBS Chargemaster 1500 or the somewhat less expensive Lyman version. Worth every penny, believe me. I quit using stick powder like 3031 and 4831 doing load work ups. With either the Lyman or RCBS tool, you calibrate it, punch in the load you want and the tool drops it into the pan, weights it and you're ready to drop the charge into the case. Put the pan back one the scale and it drops the next preset charge. While it's doing that, you sat the bullet on the freshly filled case. I like it so much that I even broke down and bought an 8 pound jug of H-4350 to play with.
The first way works but is very time consuming. I did the load work up for my ex-son-in-law for his new .300 WSM. He picked the brad, powder nd bullets. When I saw that can of IMR-4831 in his hot sweaty had, I knew I was in for some time consuming work. It took close to half a day getting those preliminary loads made up for testing. It only took him an hour and a hald for use to shoot them up. Well we needed more powder and as I also have to pick up some stuff for myself as well, I hit the Sportsman's Warehouse to pend my money. While I was there, they had the Chargemaster and I said to my wife, "One of these days I'm gonna get me one of those." She said, "Why not today?" I'm no dummy. I put it in the cart just as fast as I could before she changed her mind. I did the next load work up for his rifle with some new componenet in just under an hour. Like I said, "They're worth every penny."
I see you shoot the 330 gr. Lyman. Must be #458122 HP. Great bullet. I cast them and they shoot very well in my 1895 Marlin and Ruger #1S. I use 17.0 gr. of SR-4759 for about 1600, maybe 1700 FPS. I never got around to clocking them.
Paul B.