you wont need a trickler, but you will need a scale.
I have a 550, and if my hopper has a powder in it, and I want to try a load with a different powder, I have used the beam scale and trickler to load those rounds, then take them to the Dillon to seat and crimp my rounds. I'm talking about .223.
When you get your press, prime a case and then move it to the charging spot. dump a load in the case then weigh it. So this 3 or 4 times to be sure that the load coming out is the same.
After your load is set, you're off to the races.
Trickling is to give accuracy and consistency to loads dumped by a hopper. If you need 40.2 gr, but the closest you can get without going over is 40.0gr.. you would then trickle the last 0.2gr