My .177 long-range air rifle project happened before I did much photo documentation, so forgive me having no photos. Nevertheless, think I can provide pertinent and interesting insight on the subject.
I was a .22 caliber Shin Sung Career 707 rifle devotee for somewhere between several and many years before deciding to find out how a .177 Career might compare. These monsters require considerable (de)tuning to even attain a bell-curve power-band, and therefore seriously explore their fine potentials.
This being before extra-heavy .177 pellet offerings from JSB, I concentrated on the 16 grain Eun Jin Korean pellets of considerably less-fine quality. Unlike the .22 Careers, I found the .177 did not maintain 100 yard accuracy proportional to its 50 yard results; so much so that I got NO 100 yard groups even worthy of
mention. The following excerpt is from Airgun Chronicles; notice the 12-21--07 notation about the single best group 50 yard I'd acheived (that still holds that title even now).
16gr EunJin, 2400 PSI fill, 27 shot power-band- Low= 937, Hi= 977, ES= 40, SD= 5, Average= 955 FPS / 32.4 FP
Unless otherwise noted group averages below were shot with 16 gr Eun Jins at about 30 F/P. 3/11/05 Three consecutive five-shot groups at 50 yards averaged .58” in still winds. 3/17/05 Six consecutive five-shot groups at 50 yards with Premiers averaged .69”. 3/24/05 Four consecutive five-shot groups at 50 yards averaged .62” in light winds. 10/7/06 Five consecutive five-shot groups at 50 yards averaged .67” c-t-c in still winds. 7/15/06 Eight consecutive five-shot groups at 50 yards averaged .59” c-t-c. 1/21/07 Fifteen consecutive five-shot groups at 50 yards averaged .62”. The best group measured .17” c-t-c (the smallest 50 yard group in all my airgun testing!). 8/26/06 Six consecutive five-shot groups at 50 yards with 10.5 Premiers averaged .64” c-t-c. 9/10/07 Ten consecutive five-shot groups at 50 yards averaged .59” c-t-c. 9/13/08 Six consecutive five-shot groups at 50 yards averaged .52” c-t-c. 
