Notice the sift in POI between your two circled 5 rounds groups? It doesn't matter how close together the first five are if those five shift on the target (which they will). If you continued to fire five round groups you can take it to the bank that a 2+/- inch group will appear where those ten rounds groups are now.
To put another way- it looks like the circled five are a bit less than an inch? If you hung a target as big as those five, would you hit it every single time?
