What I use and recommend:
1- RCBS Charge Master. I know you prefer beam scales, wait until you start reloading 100-200 rounds at a time, making ladders to find your nodes, etc. You're going to want an RCBS Charge Master or equivalent. While I seat the bullet the Charge Master is dispensing the next load. Saves tons of time.
2- I use the Lee Power trim kit. I have both the 308 and 300WM sleeves. I rigged the trimmer with metal washers for consistency. The plastic adjustment thing it comes with is junk. Trim, chamfer, deburr in one step. I got mine set to Max SAAMI, i run all my cases through it, if they're too long they get trimmed, if they're under max they only get chamfered and deburred. It's quicker to run them all than to start measuring which ones need trimming and which ones don't. Beautiful thing is when you set the cutter to Max it will repeat in both sleeves, no adjustment necessary.
3- I prime using my Rockchucker press. Personal preference really. The hand tool feels flimsy to me.
4- I use the RCBS prep station. If you have the LEE trim kit mentioned in 2 it doesn't really matter. I find giving the primer pocket a quick clean with a brush reduces tumbling time, if you care about clean primer pockets that is.
5- If you insist on a beam scale maybe. I put a McDonalds straw in my Charge Master, it very rarely overshoots anymore. No trickle needed.
6- Tumbler, wet or dry, I use wet with SS pins.
My sequence:
1- De-prime, shoulder bump, neck size with RCBS FL Sizing die. Turn the die out at first to only neck size. The shell holder will be just before it contacts the die. When the cases get tight in your chamber start turning the die back in until you only set the shoulder back .001"-.002". Case neck measuring bushings are useful. Trial and error until the tight case is no longer so is fine too. The die will then be set to your chamber. Using a turret press will allow you to keep the setting.
2- Run all the cases through the Lee Power Trimmer. Make sure you remove one of the two cutters, they can chew or cookie cutter your case otherwise.
3- Tumble/rince/dry.
4- Prime.
5- Charge powder and load in a chain.
This gives me the best quality vs time reloads.