In the grand scheme of things, what is needed for a quick,clean kill is
A) Shot placement. Load accuracy plays a part."Adequate hunting accuracy" will do. Some "recipes" have a track record of performing well in most rifles.
Yet each rifle is an individual.
For hunting,IMO, we balance multiple factors. Is a 1.25 MOA load at 2750 fps "better" than a 2600 fps load that shoots .75 MOA? I'll leave that up to you.IMO ,a1.25 MOA rifle leaves me with no excuses.
B) Bullet weight...inspires discussion. Weight and construction. A degree of reliable penetration is IMO ,critical. Now,whether that is "blood trail pumping full penetration" or "finding the mushroomed bullet under the hide on the far side" I'll leave to others to argue. Do what makes you happy.
Someone suggested 125 to 130 gr 30 cal bullets at 3000 fps. That might not be my first choice for how I hunt, HOWEVER!!!. I'd have to be a fool to say a 130 gr bullet at 3000 fps fired from a 270 is no good.. the 270 is a respected and effective game cartridge.A 130 gr 30 cal bullet can work quite well,I'd guess.
Do what works for you.
We hunt different styles on different terrain. Some are unlikely to have a shot over 200 yds on deer.. Some expect a typical shot on elk to be 300 yds.
They might choose different bullets. Thats OK. No need to argue!
Typically a light bullet starts at a higher velocity but the heavier bullet may retain velocity better.
Conclusion: You decide! If it works, carry on! No need for us to fight over it.
In my experience, a 165/168 gr Ballistic tip launched with a book near max load of Varget at near 2700 fps can be extremely accurate and reliable in an AR-10 T. (Sub MOA in two rifles tested. Just over 1 MOA in the additional DPMS LR-308L)
Put it in the heart/lung boiler room it kills elk fine at 300 yds.
I'm not putting anyone elses load down. Do what works for you.
FWIW, after we tested and decided on this load, "Handloader" Magazine featured an article on " Ultimate 308 Accuracy load"
They found it to be 165/168 match bullets and Varget.
Is it best for YOU? I can't say. Its sure not wrong for me.