Gilly,
As I said above, the AB CBM curve for the 198 just is not good. It was shooting clear over the target on my 1500yd range in VA. I put in the Warner numbers by velocity bands and the bullets are suddenly right on the target and I mean RIGHT ON, like +/- 1-2 inches. Josh Kunz and I did extensive field testing in prep for a match and ELR shooting out west and we were very happy. (great solid impacts on the vertical dimension at 2000+ yds)
I will say you do want to make sure you 'velocity band' adjust the number. Get data here:
Doppler Data
Especially if your MV is materially lower than the avg BC reported. We were shooting the 198s out of our 308s, with MVs in the 2780 range vs the 3000+ MV of this bullet in a magnum, so we needed to adjust our BC accordingly. I was hoping to use AB's CDM to avoid doing this math, but alias, it didn't produce anything near the results we needed in the field.