best ammo

Welcome to AGN. Feel free to write a little introduction in the 'General Airgunning' section. There's also a thread for our member map. Feel free to check out the map to see if there are any other members nearby. You might be able to try their guns, share ammo, learn new shooting techniques. 

What kind of guns are you using? Each gun seems to have a type of pellet that works best in it. Trial an error is the only way to find that magic pellet. Some airguns also benefit from different methods of holding the gun to improve accuracy.
 
Well for me. I would use lead pellets. And a good place to start are crosman premier.(either the hollow points or domes) These are easy to find and many have good luck using them. I have boxes and boxes of pellets, sample packs, and every brand someone says they like in their gun. I think most of the time its not so much the pellet as the shooter in my case? Shoot 2 or 3 tins and as some say that breaks in the rifle but I think at times it just makes you and the rifle come to an understanding? :)

And what distance can you hit a 1 inch circle(draw a circle around a quarter) consistently ? 25 yards would be good for hunting with that combo. I think most would tell you to use the .177 for target and the .22 for hunting. But with a combo rifle I would use the barrel that was the most accurate.

But since this is the internet and everyone is moa you shoot the distance hunting that you know will result in a clean kill.
 
Tell us more about what you are doing. What distance are you hunting? What animals? What pellets are you trying? If your distance is less than 40-50 yards or so then it is likely that your gun is just not powerful enough for what you are asking it to do. That is an inexpensive gun and they tend to way over state power on them for marketing. Sure it may shoot a spit wad at 1000fps but a good weight pellet may only be at 500-600fps. If you could test it with a chronograph then you know for sure and can calculate the power then determine if its enough for what you want.