What ever your marksmanship, remember, your groups are always an indication of a multitude of errors/problems. If there were no errors, you would achieve the literal meaning of a zero where the bullet path and line of sight intersect and there is no measurable value between point of aim and point of impact. With this in mind, the only way you will see improvement is through comparative analysis. This means you need to try out ammunition that appears to be the sort you need for what ever the need is. If groups can be discerned as being consistently smaller then it is likely the ammunition is indeed more accurate, no matter your skill. Of course, if you can not yet shoot a group, ammunition appraisal is the least of your concerns. Thing is, even match grade ammunition does not reveal its capability at short distance; but, shooting such at longer range introduces effects on trajectory, like wind and weather, which also preclude meaningful appraisal. Therefore, you might want to get a chronograph to measure performance, i.e. SD and ES. This will indicate quality that you cannot visually discern from the target at the typical 100 yard zeroing/grouping distance, or at longer distances for which you do not yet have the necessary knowledge to be able to discern the meaning of results.
