Daystate Huntsman Regal .177

Pellets tried to date:

Daystate Sovereign Rangemaster
Bilsey Magnum 4.5
Air Arms Diabolo Field
H&N Field Target Trophy
JSB Exact Diabolo 4.52
JSB Exact Diabolo 4.53

The Daystate Sovereign Rangemaster were the first tin purchased and I would've thought they'd be a good match being the same manufacturer. Very wrong and they're expensive compared to the rest!

Winner:
JSB Exact Diabolo 4.53

Very close second:
Air Arms Diabolo Field 4.52
JSB Exact Diabolo 4.52

Almost be up with the best:
H&N Field Target Trophy


Worst:
Bilsey Magnum 4.5

Worst by far, bordering surprisingly terrible:
Daystate Sovereign Rangermaster

Might give the JSB heavy Exact a try as my rifle seems to like the heavier pellet.