Ok. Currently I shoot 70grBTs in my .243 for foxes and use my .308 for all my deer work. I was just wondering if there was a heavier .243 bullet i could use for deer that would shoot similarly to the 70gr without having to adjust my scope each time? I.e could i just slot a 100gr in my .243 when i went out stalking without having to worry about altering the scope a couple of clicks each time? I havent shot a 70gr then say a 100gr at paper to see what the differences are.