Do yourself a favor, don't shoot it. Just trade it and move on. Cause if you do shoot it, you will understand why the 25-06 has stood the test of time, no matter what it challenged by, no matter what new cartridge comes out, they come and go, and the 25-06 still stands. There is a reason why every rifle company out there offers a 25-06, cause it's just that dang good.
Accuracy? Ever heard the old saying accuracy kills? The 25-06 has been accurately killing goat in mtns, antelope in the prairie, and whitetail throughout the US for decades. Not only this, but some hunters use them to hunt Elk, cause they are so accurate and punch packing, it is effective.
Noise? The 25-06 has a very distinctive sound. It's more of a cracking boom.
Ballistics? Well, that depends on several differ things. Barrel length being the major factor. Shorter barrels tend to be less effective ballistically. 24 inch plus will produce better results past 300 yards.
If you decide you wanna shoot it and see what you have, I love the hornady 117 grain SST superformance. But, I've seen the 110 grain accubond produce awesome results ballistically.