Accubond or Barnes. Collected some interesting info this winter regarding impact-performance on some common & some not-as-common bullets... still adding info & pencilling things out, but here's a pic of a few of the bullets recovered
All are 6.5 & 7mm, but in terms of Brand & expected performance like you are asking for, this shows pretty good example what to expect. All shots were at 200 yards, first impacting a 1/2" plywood, then air, then a flooded hillside backstop (where a natural spring) had flowed/continuously flooded the hillside* The ice was roughly 10-12" thick with snowpack on-top at the time of firing. Generally speaking, the penetration varied from 3-4" to completely through and into frozen dirt (heaviest 168 & 190gr bullets)
To sum it up, from what we saw, Barnes & Accubond are the only two in terms of "hunting" bullets that consistently opened/expanded and (worked) the way they claim they do... some of my 140 Bergers amazingly only bannana'd at 200! ?? But is a topic for elsewhere.
Take a good look at the pic. I strongly recommend the two I mention for obvious reasons... and to add to that, the Barnes definitely do work well at LR. I personally killed my elk this past November with a 168 LRX 700 yards... they open at that distance
I really like the way Matrix pounded that hill.. I have two more recovered slugs (not pictured) that are a ball-mess of lead & copper, not mushroomed but seemingly somewhat still bonded! It ain't a bullet I'd take for Griz, I'd want the Barnes "solid" myself, but none-the-less cannot dispute what the 190 does upon impact* In my own testing, it actually "does" as the Bergers (claim) to do.. I am seeing countless Bergers (all the Hunting VLD's) that are not opening, instead Bannana... at distances close as 200 as well as distances as far as 1150. I lost appeal toward them after foolin around this last while.. there were some (3:4 roughly) that would grenade, those were the ones giving 3-4" penetration on ice then disintegrating... however, that 1:4 is too re-curring of a ratio to put my-own mind at ease if it were reliable expansion (or grenading) that you were counting on.. they're accurate, but performance isn't consistent for some reason
Anyhow, see what you see... I hope the post will help make your decision more educated. Wish ya luck on the hunt**