I was making a case for cheap bullets a while back in the reloading forum. It pretty well agrees with Chuck Hawks.
My new "student" SuperCore figured this out last Fall. He had an M1 Garand out for his first deer hunt. He was trying to get his group to settle in and he'd brought a bunch of ammo. Some was high-end Hornady. Some was high-end Remington. Some was cheap green-box Remington. They all shot pretty well out of the Garand. After about 40 shots, SuperCore asked me what the difference was between the cheap stuff and the premium.
"About $20/box." I replied.
"What about the ones with the little plastic thingies?"
"Oh, those." I replied. "When they first started marketing those inserts, hunters were told they kept the tips from getting mashed up in the magazine and that made the bullets fly straighter. When that didn't sell, they then started saying they were for controlling the expansion of the bullet."
"How well does that work?"
"About $20 a box."
If you're using a .308 WIN, start with the cheapest stuff you can find at Walmart and work up from there. At reasonable distances and reasonable conditions, you should do just fine. If the cheap Remingtons don't group well, try the cheap Winchesters or the cheap Federals before you try premium stuff. Deer are not that hard to kill.
Don't make the mistake of assuming that one shot/ one kill is going to always happen. Also don't make the mistake of assuming that it is related to the ammo. Ammo failure is the least of your worries. Shot placement is your biggest concern. If you put the bullet where it needs to be, the deer is going to go down. . .
. . . well, most of the time. See, one thing that hunters don't like to talk about is all of the goofy stuff that happens to them. They think it reflects on their manhood or something. To be honest with you, I've drilled deer and had them stand there and look at me. I've also had them go back to feeding. One big buck took 3 rounds of 35 Whelen through the chest at 80 yards and stood there defiantly waiting for the 4th. Sometimes there may be nothing recognizable left in the chest cavity, but the deer goes back to feeding. It isn't you, it isn't your rifle, and it certainly is not your ammunition. This is not something a plastic dingus on the end of the bullet is going to fix.
Do yourself a favor, be ready for follow-on shots. Work on what it takes to shoot once with discipline and then take that same discipline and put another well-regulated shot into the beast if the opportunity presents itself. +90% of the time, your crosshairs will come back to rest on 4 hooves in the air, but you need to be ready for the times they don't.