Trying new Ammo is one of the many ways to get better group sizes, but proper Scope mounting and your fundamentals are just as important. Besides ammo adjustments most pull off the scope after they purchased the rifle and remount it just to ensure it is done correctly, as their have been many reports of loose screws and scopes shifting all over the place in the rings which cause accuracy issues. Being you have a 30-06 shooting 180's it would be good idea to make sure that is done correctly as that probably has plenty of kick.

When I first started shooting I tried a Lead Sled and it actually didn't help much at all. Hopefully, you will get better results. Good luck and congrats on the new rifle!!