Ratherbe,
The .357 out of a rifle barrel is an entirely different animal from the .357 out of a pistol With regular factory 158 grain soft point jacketed rounds (not hollowpoints!), you get 1,275 ft pounds at the muzzle and about 600 ft pounds at 100 yards. These are very good deer killers out to 100 yards, assuming you do not put it directly through the shoulder bone joint. (Always shoot behind the shoulder, or take a high lung shot.) It will often drop them where they stand. But, 100 yards is absolutely your maximum range.
You can also buy high powered, with caste bullet, .357 rounds from Buffalo Bore company, that have 1450 foot pounds at the muzzle, and about 1,000 ft pounds at 100 yards. Very expensive, but devastating on deer. Very close to the .30-30, and probably more like the .35 Remington in effect.
And, you can buy 180 grain, high powered hunting rounds from Core-Bon, these are higher powered than the regular factory load, but not as powerful as Buffalo Bore.
Never use a hollow point. Always use a factory, jacketed, softpoint bullet (the Remington Core Lock are great), or one of the special hunting rounds from Buffalo Bore or Core-Bon.
Forget trying to use .38 specials in your rifle for practice. They hit as much as 10 inches lower than the .357 round at 100 yards, and so you have to resight your rifle for the .38, and then resight again for the .357 at hunting season. A big waste of time in my opinion.
Hope this helps.
Mannyrock