Okay this is better than the solution I came up with, but you seem to be way more of a VBA expert than me, but would his have worked just as well, or is there a reason your "With" solution is superior?

Sub copier()

'Creates Row Offset Variable'

Dim y As Integer

y = 0

​

Dim x As Integer

Application.ScreenUpdating = False

NumRows = Range("A1", Range("A1").End(xlDown)).Rows.Count 'Number of rows in sheet'

Range("A1").Select

' Establish "For" loop to loop "numrows" number of times.

For x = 1 To NumRows

Dim z As Long

'Number of times to copy row'

For z = 1 To 10

Rows(1 + y).Insert

Rows(2 + y).Copy _

Destination:=Rows(1 + y)

Next z

y = y + 11

Next

End Sub