Depending on what you intend to hunt and the range you will hunt at, the vortex might be just fine. I'm currently using a crossfire2 on my .243 varmint rifle, also a Savage. I keep thinking about upgrading it, and then I shoot another 300yd woodchuck and the feeling goes away. My particular load is good for a dead on hold anywhere from 50 to 350.
Learn your rifle, learn your hold overs and all is well. You do not need to dump a lot of money into it as it came pretty well situated out of the box. Do check all the screws. A 1/4" torque wrench in in/lb should be sufficient. Remember in/lb not ft/lb. While most factory guns are fine, every now and then, the new guy is tightening the screws.
6.5 manbun gives you a pretty wide range of ammo and critters you can hunt. I have always had good luck with Savage rifle accuracy.
My 100yd 4 shot group out of my savage Axis .243 with my handloads.
Practical results 260yds off bipod from prone.