Your testing does not have much to do with a hunting rifle!
If it's a target rifle requiring multiple shots of course we test them that way.
If your shooting was at 100 yards? Then the groups were ok for a hunting rifle.
I have found that the first shot from a hunting rifles cold barrel is most effective in getting game.
I fire one shot record it's impact and then fire another if wanted.
I try to hunt that rifle with the barrel in the tested condition.
Here is a target fired with my Kimber Montana 308!