177 is definitely harder to fight the wind with especially with light pellets.I can get decent accuracy with the BSA. I've settled on the HN Baracuda 4.52 in 10.65 grain. At 40Y it's a consistent 0.5", but at 50Y it opens up to 0.75". My initial mistake was that I had lowered the regulator to 110 bar to get more shots, but the accuracy is better with 130 bar.
I don't see myself getting a consistent 0.5" at 50Y with the BSA. Probably the 0.177 caliber doesn't lend itself to such endeavor, at least not in this rifle. Also it's a pain to remove the stock to adjust the power.
That's why I bought a new air rifle in 22 cal. It's the FX Dream Tac. I'm waiting to get some JSB and FX hybrids early next week to do some accuracy testing.
I did plink in the backyard with some premier HP 14.3 gr I had and it shot decent. On full power (30 ft/lbs) it's pretty loud. On low power (15 ft/lbs) it's the equivalent of the BSA (20 ft/lbs). The trigger on this FX is brilliant with a crisp break of right below 1lb.
The 22 will do better in the wind and the FX’s like the 18gr pellets shooting around 880 FPS. I usually only shoot the 18.1gr JSBs and 25.4gr Redesigns in my Crown and it loves them. It takes more air and usually more speed for the 25gr pellets. Mine Crown likes them around 930-940, but other rifles have liked them at 980. The 18gr at 880 with light wind should do great at 50 and will do ok at 100. The 25s usually do better at 100.