Re: Next year\'s new toy!
The most accurate rifle for under $1000, IMO, would be yours, IF the action is trued (and Kirby is another who can do this correctly), a new custom barrel/chamber installed, wearing solid bases/rings/scope it will shoot. You can do the bedding and trigger work to save some money.
I personally would spend the first $1k on the scope/base/ring combination and do your bedding and trigger work, then when you can afford to have the action and barrel work done.
Find an acceptable load quickly and practice what you learn of this longrange stuff over the first year to learn your system thuroughly, it will take some time but is must be done. Put much practice into learning to connect POA and POI with the first shot at any range presented, quickly, and a laser rangefinder you will find is a must have.
Extending your effective range will be more a function of how well, consistantly and quickly:
1 - you can hold and shoot the rifle
2 - calculate range to target
3 - calculate MOA needed to dial/hold to compensate for bullet drop
4 - judge wind speed/angles then deflection and compensate
than it will be a function of how small the groups your rifle will shoot however, group size capability will eventually limit your range at some point generally somewhere beyond 500+ yards on deer or larger game. Just saying, when group size error combined with vertical and or horizontal error become just to large to maintain consistant kill zone hits, range can then be extended somewhat by tightening up the group size a rifle is capable of, ie. truing and rebarreling may then be viewed as a definite limiting factor.