I'm resurrecting this thread because I didn't get any feedback on which powders to try and I'm finally going to get to this loading project. Sometime between December 2020 and now, Barnes stopped indicating the most accurate powder tested in their online load data. I guess I'll continue to assume that IMR 4350 was the most accurate powder they tested (doubt it changed in the past 6 months). Anyhow, I'm looking for recommendations on which of the following powders I should start my load development with for the Barnes 150 gr TTSX. Luckily, Hodgdon's lists load data with that bullet so I have their data as well as Barnes.
RL17: Highest velocity in Barnes data and many people like this powder, but I only have 1 lb. so I'll only have enough for 40-50 rounds after load development. This is a hunting round, so maybe not a big issue, but I'm still not excited about working up a load for a powder I'm on the verge of running out of.
IMR 4350: Highest velocity in Hodgdon's data, Barnes used to indicate that this was the most accurate powder tested, and I have 8 lbs of it.
Hybrid 100V: 2nd highest velocity in Hodgdon's data, and supposedly meters better than IMR 4350; I have 3.5 lbs of it.
IMR 7828SSC: 3rd highest velocity in Hodgdon's data, should meter very well, and I have 4 lbs of it.
IMR 4831: 6th highest velocity in Hodgdon's data; I have 9 lbs of it.
So, I'm leaning toward either IMR 4350, H100v, or 7828SSC. I like the idea of the better metering in the 7828SSC and it yields nearly the same velocity as IMR 4350 according to Hodgdon's, but on the other hand, at one point Barnes indicated IMR 4350 was the most accurate powder tested with their 150 gr bullets. The other attractive thing about using 7828SSC is that it isn't as useful as H100V and IMR 4350 in the other chamberings I load for: .30-06, .25-06, and .338WM.
One other issue is that I load in my dehumidified basement, so temp is always around 60 degrees F, and I will mostly hunt at temps in the range of 10 - 40 degrees F.
Thanks for any input on these powders.