I agree that it is pretty good. Four shots into about an inch at 100 is pretty decent, especially if it is "typical" of what you get, and not a cherry-picked best-ever group.
If you shoot five groups, with the same rifle and ammo, and don't make any mistakes while shooting them, chances are that each group is going to be a different size. And one of them will be the largest, and one of them will be the smallest. Now while the smallest one is usually the prettiest one, it is more meaningful to remember and consider all five groups that were fired - in total, they are a lot more representative of how the rifle/ammo is performing, and might be expected to perform when firing a sixth group.