If you are going to do any long-range hunting, or if you want to improve your marksmanship beyond 50 yards, you need a spotting scope. You can’t learn & grow your skills if you can’t see what your current performance is. Not knowing where your last bullet hit will hold back your development as a shooter. And running downrange to examine your target repeatedly is going to tire you out and piss off your fellow marksmen.
A binocular is fine out to 50 yards, but beyond that distance the lack of magnification is a problem.
And, no, the scope on your rifle is not “good enough”, even if it is a fancy German brand. It doesn’t have enough magnification, and you don’t want to get into the habit of aiming your gun at everything that you want a closer look at.
If you want to improve your skills with a long gun, and get your guns sighted in correctly, you need a spotting scope. In optics, you generally get the quality that you pay for. Below, I will address some of the considerations that you need to think about before choosing a spotting scope.
Kahr Arms has been pursuing a 2-tiered product strategy for a few years now. When they entered the market, they sold high-quality pistols at pricepoints higher than Glock. They now sell a high-end version of a gun, as well as a low-end version. The potential benefit is access to a category of customers that normally wouldn’t be considering your product. The risk in such strategies is that you might negatively impact the sales of the high-end gun more than you gain from the sales of the low-end gun; and that you might dilute your brand’s perception. The vendor must be careful in designing their product tiers to clearly differentiate the tiers for the customer.