Back in 1983 when I was a 2nd year trainee golf professional I had my golf club construction theory exam. To this day I can still remember the standard lofts of golf clubs. I have created a table below showing the different lofts of the same clubs 31 years apart. It makes interested reading.
|1 iron||18 degrees||Hybrid|
|2 iron||20 degrees||Hybrid|
|3 iron||24 degrees||20 degrees|
|4 iron||28 degrees||23 degrees|
|5 iron||32 degrees||26 degrees|
|6 iron||36 degrees||29 degrees|
|7 iron||40 degrees||32 degrees|
|8 iron||44 degrees||36 degrees|
|9 iron||48 degrees||40 degrees|
|PW||52 degrees||45 degrees|
|SW||56 degrees||54 degrees|
From the table above. A Ping G25 7 iron is the equivalent of a 5 iron from 1983. So if we allow a 10 m difference per club, we are looking at a modern 7 iron going some 20m difference in distance to that of one from 1983.
As you can see down the bottom of the table there is a 9 degree difference in loft between the present day PW and the SW. This gap is difficult to cover and requires a great deal of skill touch and feel.between these clubs. So the golf club manufacturers have created new clubs called things like a Gap wedge, U Wedge, A wedge etc to fit in between this gap.