Which bullet is most accurate in your gun?

[Canuck44]

I have been reloading for about a year and had good luck with 130 grain sierra gamekings in my 270 win for accuracy, pretty typical for me to get 1" groups +/- with them at 100yrds but not a whole lot better than 1" and sometimes a bit worse, I was happy with this as I am using a 40 year old gun and may not be the best shot out there. I have also tried some other types, hornady, prohunters, 90 grain hollow points, speer ???, and nosler ballistic tips but none have been better than the game kings.

Today I tried a ladder test of some 140 gr accubonds I loaded up and was getting the best three shot groups yet, close to 1/2", point of impact was also higher than for the game kings and this for a load that is supposed to have lower muzzle velocity. None the less I was pretty impressed with them. Has anyone else had similar results? Are the bullets higher quality or is it just luck of the draw what your gun likes?