The 45/90 will be fine for 1000 yd. shots. I use it for 800+ yd. BPCR target shooting and it's real good at that distance. The bullet must be heavy for the bore size and using around 90 gr. of Goex powder. This caliber is also good for most big-game hunting, as it used by many for buffalo hunting. It takes a certain level of dedication to the sport, as it does with any thing you want to do well at.