It is unclear what that means.
If we say a mule deer has a 15 inch kill zone then a rifle that will stay at 1 inch at 100 yards should be adequate to kill a deer at 1000 yards accuracy wise. However, if the rifle will only shoot 2 inch groups at 100 yards then the effective range starts to drop down to 750 yards. Wind, mirage, range error, poor shooting technique all must be considered.
So, the standard places to start with a rifle is to bed the action and adjust the trigger to about 2-3 pounds. If you need a gunsmiths to adjust the trigger then have him check the rifle over to see what he thinks about the action. Let him borescope the barrel and maybe while he is at it redo the crown.
Take a piece of fired brass and roll it across a flat table top and see it it is relatively uniform or is it is bumping and out of round. This will tell you something about the chamber.
There is a thread called something like "When do you stop cleaning your Rifle". Read what Boss Hoss said and do what he said.
Get a concentricity gauge and check your reloading process to see how good your ammo is. Buy good brass.
You will also need to do the same things to your practice rifle.