Ap M2 SL 9745

[Cosine26]

According to the information that I have Saint Louis Ordnance Plant converted to non corrosive primers at the following lot numbers:
30-06 Ball – Lot No. 9420 – May 1952
30-06 AP- Lot No. 9467- July 1952.
Therefore it would appear to me that you have a non-corrosive lot.
For loose ammo (i.e. Lot No. unknown), I would consider any “SL” ammo earlier than SL-53 to be corrosively primed.
Hope this helps