I’ve been using the the 153.5s, my rifle likes that bullet more than the 156. We’ve shot quite a few deer and antelope between 450-760 yards with that bullet and it’s been great, DRT results. If I was gonna hunt bears I’d probably use something like an Accubond though, I used the 143 LR Accubond on an Aoudad hunt earlier this year and it gave some great results just over 600 yards, the wife shot hers at the same range and also had a good result. Both were one and done, tough animals.
Ive seen and experienced some bullet splash with Bergers and ELDXs in 6.5 and 7mm up close, I think those bullets do better at range with the way they are made, they expand well at lower velocities but can splash close. Bears are thick, I think an Accubond, long range Accubond or Barnes would be a good choice for LR bear hunting.
Not sure I helped that much but that’s what I’ve seen.