i shoot at 260fps also...i went with 15, 25, 35, and 45, 55 i gapped up there but never shot passed 40 yet..i figured my average hunting shot will be within 20. figured most will be 10-15yds. no worrying about that inch or 2 for me...also i noticed im only a hair low at 20 with my 15yd pin...wierd but its true..maybe an inch..but all my pins are gapped the same amount...or atleast they look it...and my 25 and 35 shoot true. ill probably stick with my 15,25, 35yd pins next year...unless i goto a slider...which i will keep set at 15 or 20..