Air Arms Owners Club

I have owned my Ultimate Sporter for a few months, letting it settle doing general target practice with AA 0.177 (nominal) ammunition. On 12/07/15 I conducted ammo comparisons: 10 shot string, from bipod to target set at 40 yds. Center to center results:
AA Field 4.51 = 15.3 mm
AA Field 4.52 = 11.4 mm
JSB Exact 4.51 = 22.8 mm
JSB Exact 4.52 = 4.6 mm (Yes 4.6 mm)
Bisley Magnum 4.52 = 15.2 mm
All washed and lubricated with Napier Power Pellet. I'll conduct further tests with Falcon, Weihrauch, RWS & Accupell in my stock. Then the best un-lubed. Hope this helps you all. Suggestions welcome.
Best wishes, Rappa Blue Milton Keynes Air Rifle Club

Looks like you need to buy as many of those Exacts as you can get your hands on .

BBF

Nice results from the JSB Exacts, but may I suggest you try a sample JSB Exact Express in 4.52. My S510 loves them and reports cloverleaf groups at 45 yards, it's even pellet on pellet when the nut behind the trigger gets his act together.