"The 185 TSX BT has a BC of .352 and a SD of .231"
Let me gack a bit here...
.352 is a very low BC. It's getting into the realm where it actually DOES start to matter for practical purposes! With that low a BC, the bullet is really going to move around in the wind. Allow me to illustrate.
-in a 10 mph crosswind, a (let's say) 225-gn Accubond started at 2875 fps will drift about 10" at 400 yards.
-the 185 TSX, started at 3100 fps, will DOUBLE that and drift about 20" at 400 yards.
In my experience shooting low-BC bullets at longer ranges, when you get down as low as as .352 BC, you are into the realm of wind movement that actually matters- compared to what you could have- and into a realm of wind movement that actually matters, and WILL cost you hits on a vitals-sized target.
In addition to that, Utah708 failed to get an exit on a bull elk with (2) 210-gn TSX's from a .338. Broadside. So... Barnes bullets are not some sort of miracle pill that penetrates all the way every time regardless of bullet weight.
I'll pimp my favorite bullet for .338. Give the 225 Accubond a try (RL19 works great). It shoots great, it has such a high BC (.550) that it makes the .338 a bona-fide 600+ yard cartridge, and I've seen 2 elk killed with that exact load and it exited both times, with the animal DRT. Granted, they were all 200+ yards.
Just my opinion, but a 185 TSX would be a poor choice for a .338. You can do better.
_________________________
Nothing is exactly as it seems
Nor is it otherwise