Thanks 2bad, well put.
As a hunter, I can tell you there is no way i want to be schlepping a heavy-barrel
anything through the bush. Short, light, easy to shoot free-hand and in a cartridge that stands an excellent chance of a first-shot kill anywhere in the centre of mass. Forget anything in a 223 bolt face as a novice. Accuracy... well minute-of-deer-heart accuracy is all you need.
On that basis, go Stevens 200 in a 30 cal. with a low-power scope
Varmints (and targets) are another matter. (I am fanatical about this type of shootimg) The round needs to be highly accurate, fast and shoot flat. Hunting rounds generally use kinetics influenced by weight. Given the size of target, the distances and the variable ranges, and given the volume of fire you will have, you want a heavy barrel, bi-pod or front rest, you will want a scope with high magnification, and you will want a stock designed for shooting in this manner. The list of calibres is endless, but if you are not reloading and money is an issue, go 223 or 204 and stick with bullets that fit your twist rate.
Go ahead and buy a one-size-fits-all gun, but bear in mind it won't do both jobs very well at all. Most people shoot maybe a box or two of hunting ammo a year. My advice? Spend your money on a good varmint or target gun, with a GOOD scope and then collect a bunch of pop cans and bottles and go cash them in on a hunting rifle.
When I design a .25 MOA grizzly-gopher slayer with a 2-50X scope that will fire my new 20-700 nitro cartridge, I will put them in the EE
