Use FIND Instead Of Looping

I'd heard that using FIND might make macros run faster than looping. Below is the code I'm currently using. There are two worksheets. The first has a column containing numbers and a blank column to insert the associated code. Sheet two has a list of unique numbers with the associated code. Presently I used a nested loop to populate the code column of the first sheet. As sheet 1 contains in the neighborhood of 25,000 rows it can take quite a long time to run using the loop

Option Explicit
Sub BWRawCoding()
Dim wb As Workbook
Dim wsPT As Worksheet, wsAgg As Worksheet
Dim RowsPT As Integer, RowsAgg As Integer
Dim LoopPT As Integer, LoopAgg As Integer
Set wb = ActiveWorkbook
Set wsPT = wb.Worksheets("Graphical Data -RAW")
Set wsAgg = wb.Worksheets("agg")

RowsPT = wsPT.UsedRange.Rows.Count
RowsAgg = wsAgg.UsedRange.Rows.Count

For LoopPT = 2 To RowsPT
For LoopAgg = 2 To RowsAgg
If wsPT.Cells(LoopPT, 6).Value = wsAgg.Cells(LoopAgg, 2).Value Then
wsPT.Cells(LoopPT, 24).Value = wsAgg.Cells(LoopAgg, 1).Value
End If
Next LoopAgg
Next LoopPT
End Sub