premium/most consistent .177 pellet

The primary objective of my HW97 is to cull the squirrel and rabbit population around here a bit. For that reason I opted for the .177 model for a slightly flatter trajectory. I care very much about ethical, one-shot kills on game and for that reason I care very much about using the best pellet available for the best possible chance of a kill shot...even if it costs a little bit more. Also, I have no time or interest for sorting and/or measuring pellets. What .177 hunting pellet out there is going to be the most consistent/lowest maintenance right out of the box or tin? Thank you!
 
Ammo works the same across all rifles. You have to test different ammo and weights for your rifle. The power you plan to shoot at matters too, as that will determine the best weight options.

Most people don’t measure or sort, and especially not for hunting, so you don’t need to do that. 

Because you are asking very generically, I will say bee generically that JSB is widely considered - very good pellet in most rifles. You could start there if you don’t want to try several brands.
 
As Smok3y stated, the JSB is generally considered the best bet. However, even if you had stated your specific gun, fps, and barrel configuration, your results will vary because all guns shoot a little different.

For me, the JSB Exact Monster .177 Cal, 13.4 Grains shoots the best, but this is not the most popular as posted on various threads here. So, get a sample pack and start there.
 
You will never know what is best without testing. Same make and model rifle might not like the same pel!et !!! Go with popular names like jsb and others, they are popular for a reason !! Weight and head dia can have a big impact on accuracy. So will a tune up, even a simple tune using stock parts will make a big difference. If your looking for an out of the box tack driver with any pellet on the market....dream on...it isnt out there !!!
 
Like the others have posted, you need find the pellet that is the most accurate in your rifle to have consistent results.

Regarding what pellet is the most consistent, I've found the Predator Polymags to be. I can't recall ever seeing a distorted or damaged Polymag from the tin. As luck would have it, they are the most accurate pellet out of my HW.
 
There are 3 very different .177 rifles I have that have come to agree on the JSB match 10.34 Exact Heavy: RWS 460, Diana 34 , and an AT44 10. I do head size them. They'v all fallen away from that pellet a time or two, but eventually have come back to it for accuracy purposes. I'm good to 50 yards with the AT44 10, with the RWS and Diana we're good to 30-35 yards and 15 to 25/30 yards with the HW 30, but that's with a pointy pellet. When pellets start to wander It seems to be a seasonal change. At 4300 ft up the side of a mountain the density altitude can change from 3500 to 8500 feet. Performance changes accordingly.

Enjoy whatever yea got...
 
Thanks folks. I understand that there are pellets of varying quality and that each gun is a different animal that likes different varieties. What I'm really after is a premium pellet that has already been sorted, measured, and scaled to within more stringent specs than most...even if it does cost more. The numerous recommendations give me something to start with--thank you!--but I'm lazy. What I'm really looking for is a pellet that gives me the highest possible consistency and quality without me having to discard half the tin. Some people call me ADHD...but it's really just laziness. It seems like there has to be a premium pellet out there somewhere that is guaranteed to be within certain specs and parameters of consistency.
 
Thanks folks. I understand that there are pellets of varying quality and that each gun is a different animal that likes different varieties. What I'm really after is a premium pellet that has already been sorted, measured, and scaled to within more stringent specs than most...even if it does cost more. ........It seems like there has to be a premium pellet out there somewhere that is guaranteed to be within certain specs and parameters of consistency.

If it were only as simple as you're hoping. 

Consistency is good, but it's not everything when it comes to pellets that a specific barrel likes. The really wild thing is how much variation from batch to batch can be seen. And by "seen" I mean the accuracy results when shooting, not necessarily anything that can be physically measured or observed about the pellets themselves. I've witnessed it with various guns and pellets but the most striking example was a Red Wolf Standard .22 with the 18.13gr pellets. That gun shot nearly everything unbelievably well. Most shots touching at 55-60 yards was normal. But there was one particular tin of 18.13s that shot 4 inch groups at the same distance. Switch back to the "good" tins (same brand, same weight, just a different lot #) and it'd go back to stacking them. Now, if that was the only tin of those pellets that I had available to me at the time, I would have assumed the gun just didn't like that particular pellet. 

I've also seen a specific tin of known-to-be-good pellets from one gun, shoot like junk from another gun. 

It'd be much easier on the pocketbook to KNOW that a particular brand and weight is going to be good from your gun, but without running some through it, there's no way to know.

As others have said, JSB is usually a good place to start for most guns.