most accurate pellet at long range 50 - 150 yards?

[nightstalker000]

most accurate pellet at long range 50 - 150 yards?
JSB Exact 15.9 grain .22
or
Air Arms Diablo Field 16 grain (so i am told?) .22
5.50?
or
5.51?
or
5.52?

what size?
what brand?
is more accurate. I am looking for absolute accuarcy.

shot between 28-33 ft/lb

preferably in a daystate barrel as i have an airwolf mvt fac rated .22

i want to find the best pellet and stick to it as i estimate it is one of the above.

if anyone has actual experinece of this it would be much appreciated.
ones first though would be to go for the 5.52 size as with a high power rifles the extra diametre friction in the barrel is overcome with the high power (i am shooting these at the moment with very good results) but want to know for sure if these are the most accurate, want to push the bounderies and want to find the most accurate solution.

I will be trying the above over the coming weeks in my own barrel after cleaning but i also would like to get an idea of what others are finding with a similar setup which might save me buying all the above pellets in quantity.

[demonloop]

The AA Field, being relabelled Exacts, will shoot well, but the Exacts labelled tins usually shoot better.

5.52 gives our best results, but depends on the rifle