No person on this forum or any forum can give you the magic recipe for YOUR gun and expectations. You can go as inexpensive as you like and hope for the best or spend a few dollars and be assured that you will have years of good product service....would not want to have issues with a cheap scope or etc. when on a once in a lifetime hunt. In most cases. people who go the inexpensive route end up spending more in the long run since they are not initially satisfied and opt for the better later. Learned from my own personal experience. On a tangent, sorry.
Select the bullet grain weight you want to shoot and purchase various factory loads to see how they perform out of your gun. Make sure you shoot out to the yardage you intend to shoot using good shooting practices (waiting between shots to let barrel cool, good rest and etc.). Just because you get a good group at a 100, it may not perform well past 300 and etc. If this does not work for you, then do as most folks eventually do and that is to hand load.
Also as mentioned, glass is not the item to be cheap on. Purchase what you can afford as long as it is by a quality manufacturer with a good warranty. For those mountain or rugged hunts, you want a product that can withstand heavy recoil, dependable and repeatable performance.
As for the gun, what you have is a good platform, but to ring the best out of it you need to at least bed the action. Extras such as this may make a difference between an ethical kill at range or a wounded animal.
Finally, practice, practice, practice. I can't say this enough. It is the only way you can know the capability of your equipment and your shooting limitations.
