Planning a deer/pig build and considering 6x45. Will be a woods/drive gun. 200yds and in. Thoughts? Or would 6.8 be better? I have a TON of 223 brass......
6x45 and the 85g sierra GKHP will do them both and at 200-300 yards is simple life.
The other great antelope/deer/pig bullets in the 6x45, 80g barnes, 80g speer, 90g nosler HBT.
The 6.8 would be a tad better, but that 6x45 is just the icing IMO.
I have a 6mm WOA, and a couple of 6.8s. The 95 gr. Barnes TTSX bullet changes the game, well in favor of the 6.8 SPC. But the 80 gr. TTSX in 6mm, puts a hurt on anything it hits, too. Tough choice... I did them both.
I killed several deer with my 20" AR using the 75gr Sierra HP. It worked really well & acted more like a controled expansion bullet at 6x45 velocities... Built a 6x45 bolt gun last year & killed 6 deer (out to ~250 yards) with it this year with the 70gr nosler. I never got any exits (bullet was always in off skin) but the deer never went very far either. 20 yards was the farthest sprinter... This was a typical bullet mushroom from the 70's.
I don't see a real need in going with monolithics, bonded, premium, or heavy for caliber bullets. The slower impact velocities of the 6x45 have varmint bullets acting much like a big game bullet would. Still, the heavier bullets will give you better exits if needed. However, I find the bigger wound channel helps stop as much as anything.