I went down this road a few years ago (2021) and landed on TAC because (at the time) I could get it for around $27/lb. I've worked up 3 or 4 different loads for it, as well as a few loads using BLC-2, and in my limited experience, they have shown to be identical. I went with TAC because it was a couple of bucks cheaper than BLC-2. As powder became more available again, I put 18 lbs of it on my shelf along with a keg of N133 for whacking pds, and a keg of N540 for the heavier stuff. My how things have changed in the past 18 months.
Realistically, I'd go with either TAC or BLC-2. For me, they both meter the same (extremely well), and (grain for grain) produce the same accuracy and velocity in my 223/5.56 loads. Currently VV powders CAN be found for less, but as they are being re-stocked their prices seem to be "adjusting" so that they are once again a more expensive option. If you are willing to spend the money to stock up, and can find N133 or N135 for less than $300 per keg, go ahead and buy as much as you can afford. Otherwise, pick the cheaper between BLC-2 and TAC.
Realistically, I'd go with either TAC or BLC-2. For me, they both meter the same (extremely well), and (grain for grain) produce the same accuracy and velocity in my 223/5.56 loads. Currently VV powders CAN be found for less, but as they are being re-stocked their prices seem to be "adjusting" so that they are once again a more expensive option. If you are willing to spend the money to stock up, and can find N133 or N135 for less than $300 per keg, go ahead and buy as much as you can afford. Otherwise, pick the cheaper between BLC-2 and TAC.
