I have been shooting deer with a 6.5 Lapua for some years now. It's a great round but the results are inconsistent. The deer always die, but sometimes they run, sometimes they drop on the spot. There seems to be no relationship to awareness, species, terminal velocity, shot placement - perhaps there is no answer, but I fancied trying a couple of extremes to see if I could get some sort of consistency.
The Lapua shoots a Nosler 120BT at 2950fps. All pretty middle of the road.
So I now have two new rifles in the cupboard. A .308 and a 280AI.
The .308 is a stumpy. 16" barrel, shooting a 168grain AMax at 2500fps. The slow and heavy theory. A lot of thought went into the choice of the Amax. I know it's frowned upon for shooting deer with, but when your terminal velocity is going to be 2300fps to 2400fps you need a bullet that is going to expand reliably. That velocity window is reputed to be the sweet spot for the Amax, hence the selection.
The 280AI is loaded up with a 120 grain Barnes TTSX running at 3400fps. Again, a lot of head scratching over bullet selection but if you are going to launch a 120 grain bullet at that pace and are likely to get TV's over 3200fps your choices get very limited.
I have worked up loads for both rifles in the last couple of weekends and both are shooting 0.5 MOA. Next step is to get out into the field and see what happens! Might take some time to reach a conclusion, if I ever manage to do so, but it's going to be very interesting finding out.
Will also be interesting to see how the Barnes is for meat damage. Bullets going that quickly usually cause a great deal of damage in my experience, but I have been using 70 to 85 grain bullets in 6mm running at 3300 to 3500fps in the past. Will be interesting to see how different the Barnes is due to the very different construction.
I have a good plan B for both rifles if the experiment doesn't work for any reason or proves a point and rules one out for deer. Stumpy will be a great Boar rifle loaded up with 180 Partitions and the 280AI will end up shooting 140 Accubonds.