Perhaps you should try some spelling variations:
"10 metre air rifle" » "10 metal air rifle", "10 metre bar rifle", "100 metre air rifle", "10 metric air rifle", "10 metrik air rifle", "10 mettre air rifle", "10 mentre air rifle", "10 metre _ir rifle"
"10 metre a rifle" » "100 metre a rifle", "10 metric a rifle", "10 metrik a rifle", "10 mettre a rifle", "10 mentre a rifle", "10 metre _ rifle", "10 metre a trifle", "10 metre a riffle"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"10 metre air rifle\") OR (\"10 metre a rifle\"))".
• Removing quotes may allow a broader search: (( 10 metre air rifle ) OR ( 10 metre a rifle )).
• Adding a wildcard symbol may retrieve word variants: (("10 metre air rifle") OR ("10 metre a rifle"))*.