22 Cal 40 FPE/55 joules 18.3 grains 1050 FPS one charge 40+ good shot. 25 Cal 55 FPE/70 joules 26 grains 950 FPS one charge 40+ good shots. Capacity:4500 psi carbon fiber air tank volume 350 CC. For Correctly Magzine Loading please check my youtube ID:Sig Shooter. The item "AEA Backpacker 25 HP Semi Carbine With moderator(preorder only)" is in sale since Friday, October 30, 2020.This item is in the category "Sporting Goods\Outdoor Sports\Air Guns & Slingshots\Air Rifles". The seller is "aeausa" and is located in Tyngsboro, Massachusetts. This item can be shipped to United States.