Short answer. If your rifle is fairly accurate already, say 1-1 1/2" at 100 yards it would not be practical to change it for 100-400 yard hunting. It will be very capable for deer and elk.
Until lions have their historians, tales of the hunt shall always glorify the hunters. ~African Proverb
To preserve liberty, it is essential that the whole body of people always possess arms, and be taught alike, especially when young, how to use them... Richard Henry Lee, 1787