Just as another .02 deposit into this thread, I currently use a Chargemaster for my initial throw than do the final weight measurement with a Sartorius Entris64. Trickle up with an Omega trickler or pick out kernels with a pair of tweezers. It's not the fastest method for sure, but it's accurate to the kernel. If I had it to do all over again, I would just buy the A&D FX120i and full Area419 kit. Fast and accurate. Maybe not quite as accurate as the Sartorius, but I'm not sure that extra degree of accuracy actually matters. You can do great with just a Chargemaster. I had SD's <10 with a CM. I could hit targets just fine out to 1000 on a consistent basis. When you start to get really anal then the CM is questionable. Since I started checking charge weights with my Sartorius, I can see the "inaccuracy" of the Chargemaster. Now my SD is at 4.8. It's much more consistent load to load. Does it matter? Depends on your expectations. My order of progression would be:
Cheap beam or electronic scale
Chargemaster
A&D scale (hand throws and hand trickle)
A&D with AutoTrickler
A&D with full Area 419 Setup
Sartorius (hand throw)
Sartorius (Autotrickler)
Prometheus
Some of these steps give more speed, some more accuracy. Lots of people shoot just fine using only a Chargemaster. Honestly, it gets expensive in a hurry going past that point. Shooting for groups at 1000 on paper vs hitting a piece of steel in PRS are 2 different things. Not to downplay the importance of accuracy/consistency in PRS, but it's a little more forgiving, so you can perform at a higher level with a slightly lower level of both. I personally thing the A&D scale with the Autotrickler setup is a fantastic investment. It's fast and accurate. It's an investment you will not regret. If you can't afford the full setup, just get the scale. It will take you a bit more time, but the accuracy is the same.