Is that where the centre of each hole can be spanned by a 5p coin ?
On a perfect day, with a good rested position I might manage it with my TX200. Not every time though, and the TX is not a lightweight as standard - mine has a load of lead in the stock which makes it about 11lbs. It also has a prosport spring and top hat, carefully lapped barrel and carefully done crown.
http://www.airgunbbs.com/showthread....l-step-by-step
A "springer group" thread would be fun.