Long range shooting with Disco?

Has anybody been shooting their Disco at longer ranges? I have ben dabbling with my Mac 1 prepped .177 cal Disco for the last couple of days. I shot a 70 yard group that was inside an inch the other day. Yesterday I tried it at a laser measured 91 yards and got a 5 shot group just over an inch. I have not measured it yet but all five shots were in the bull at 91 yards. I had to move my 6-24 Tasco Varmit scope up 56 clicks to hit dead on at that range. I was zeroed at 30 yds. My pellet is JSB heavies straight from the tin. I shot three groups at 91 yds and the first was a vertical about 1.5" and the second was the best but the third group was not too good. The wind was calm and I fill to 2200 psi. I would like to hear from others doing any long range shooting.

Thanks,
Bob in WV

Never get in a hurry, it only slows you down.