Just my opinion, but you'll look less like a "dude" if you buy a used bolt action 7mm08,308, or 30/06 after the current game seasons are over. A slightly used rifle will save you some $$ to spend on target practice.
I have a SIL who is not a hunter. He is a military service member and does well enough with military type shooting requirements. This does not mean he's a good shot. My Daughter out shot him seriously the last time they shot at my range using her .308 HB target type rifle. You'll make a better impression on FIL if you show up with a rifle that looks like it's been used and put your bullets on the target.