The gun is a typical 700 sporter 22" barrel that I want re-barreled, walks are not far from logging roads and its pretty much open up to around 300 yards. I've had this gun for 25 years and it was never a shooter so to speak. 1.5-2.0 at 100 and 3.0 at 200. Yes I've hunted coyote before but in thick brush from a tree stand and a shot gun many years ago. The coyotes on our lease have over ran the deer, but I'm going to fix that I hope. I'm retired and need to due something when I'm not Duck or Deer Hunting. I was hoping someone could tell me if a 22" varmint contour barrel would be good enough.
I would tune up the rifle you have now before re-barreling..
1. Check to make sure the mag box is not binding between the action and the bottom of the stock if it is a ADL or the floorplate frame if it is a BDL..
2. Check your scope base, and rings to make sure they are not loose..
You only need about 15-18 inch pound on the scope rings..
3. Test your scope for tracking and holding zero..
4. The rifle may need bedding but try the above before doing that..
5. Loads:
>You didn't say whether you reload or use factory ammo..
>If you don't reload then I would sell your rifle and buy a .243 as you have more choices in bullet wt., I would think..
Your 6mm should shoot less than MOA easily if tuned and fed properly..
You also didn't say if you were planning on selling the fur..
If you are planning on selling the fur I would go with a 22-250, or .223..
.223 if you are using factory ammo or 22-250 if you reload..
As far as buying or building a rifle for coyote hunting I would go with buying an inexpensive Savage or Ruger Amer. Rifle in a .223, 22-250, or .243..
They should deliver sub MOA accuracy easily if you know how to tune loads and the rifle itself if it needs it..
Take the money you save over a build and put it into a scope and ammo, then practice..
I bought several RAR just last spring and fall to include a .223 and .243 and they both shoot 5 shot MOA groups at 100 constantly..
The only tuning I had to do was to make sure the stock was free floated and I changed out the trigger spring for a lighter one giving close to a 2# trigger..