OK, what dies are you using?Well, I guess more like $1400 on mine. For me, peace of mind and speed. I use an FX120i and a Supertrickler, but have used Auto trickers in the past. It can be accurate within 0.02 of a grain, and once programmed, throws them pretty consistently (I keep mine at +/- .02 (.04 resolution) for speed.
In reality, it’s not that necessary when you are in a good speed node, but as competitive as F-class is, I take absolutely every advantage I can get. Obvious not just the trickler, but I typical run 5-7 SD over 20-25 rounds with low teens ES and it can hold as tight at 0.1 moa @ 100 from a bench and heavy rests. Every variable I can eliminate as a possible issue helps me with everything else and I need ammo that is consistently .25 moa or better. But who am I kidding, I do all this crap, then miss a wind change and fall on my face.