To answer your question, a 30-03 should be gfood out to 600 yards, But, it isn't advised for most hunters, because, the rifles aren't accurate enough to insure a kill at that distance. With practise, and an evaluation of the accuracy potential of the particular rifle involved, would make the difference. Goin back to most rifles that use 300 Winmag, recoil isn't that different because most rifles that use 300 Winmag are larger. My Savage 112 VSSR is pretty big and heavy enough where recoil isn't a factor. If you are tolerant of the recoil and the added weight of the rifle, I don't see a reason to necessarily steer away from one. It's a common caliber and priced similiar to most of the other popular cartridges. I had a similiar recomendation when someone asked about 300 WinMag for Prairie dogs. Costs and accuracy potential are pretty similiar to the cartridges that they normally use, and you're not going to save the meat, so why not? Weatherby 300 Mag is a bit more expensive and Weatherby had their rifles on sale forever, to compete with Winmag on cost. The 300 short Mags, there's at least three of them, don't quite have the power and velocity, and they still aren't real popular, so cost will be higher. If you look a bit, you may find a real bargain even cheaper. The above mentioned rifle was bought used but never fired, for about half the current list price. 300 Winmag is also optimized, as far as accuracy potential for 800 to 100 yards. With the heavier bullets, it becomes like the 6.5's and 6.8 Grendal.