Which 6.5 Long Action

[Robinhood]

For as much love as the 6.5-06 gets on this site, there are a lot of people that disregard the .260 rem and .260 AI.

The PJ260 will push 140s to 2,900 fps easy.
The 260 AI will push 140s over 3,000 fps easy.
Both will be more than adequate for what you're wanting.

Also consider that both the 6.5x284 and 6.5-06 AI are going to be barrel burners to say the least.

Blah Blah Blah

For (hunting) guns, you will shoot it more working up loads than you will for many years to follow.
Buy a 308 to practice with and save the barrel burner for hunting and a few rounds each year to
confirm zero. Consider this also, while the 6.5 cartridges are very good, 3000 fps with a 160+ gr bullet
is still better than with a 140 gr bullet for hunting. And a 7mm rem mag would give you that without
being the barrel burner the hot 6.5s would be. It would also give you more options to use both lighter and
heavier bullets up to 190 grains. Use at minimum a 26" barrel for best results. A 28" would offer the option
of later rechambering to a larger 7mm cartridge should you desire more horsepower.

Yep