At 300 yards ,what ft/lb of energy does a 10.0 Gr .177 pellet have when it has a muzzle velocity of 1,000 ft/sec. I use a Beeman R-1 .177 Cal, Beeman 1000 22 Cal, Benjiman 312 .22 Cal, and a Sherridan Blue Streak .20 Cal. When sited in at 30 yards there is is to much hold over at 50 yards for me to expect to hit a small bird on most shots. At 50 yards holding into the wind is a must . Most all of my shots are taken at 40 or less yards. At 35 yards I have made clean kills on cottentail rabbits lung shots with the pellet rifles but I like the shots to be within 25 yards. A good book to read is AMERICAN AIR RIFLES by James E. House Krause publications 2001 Yr. Appendix C Ballistics Tables