It appears that Hodgdon has an online misprint for 10mm 180gr Jacketed bullets using Longshot Powder.
Their previous manuals listed the following.
180gr SIE JHC, Start charge = 8.5gr, Max charge = 9.5gr Longshot
This is also what Lee has published in their 2019 manual as they get their data from others like Hodgdon.
Todays Hodgdon online manual list the following,
180gr SIE JHC, Start charge = 7.0gr, Max Charge = 8.2gr Longshot
It just so happens that this new online data for the 180gr Jacketed bullet is the same as their data for the 200gr Jacketed Bullet.
Start Charge = 7.0gr, Max Charge 8.2gr Longshot.
I contacted Hodgdon a couple times via Email to inquire about this, but have not received any reply.
Their previous manuals listed the following.
180gr SIE JHC, Start charge = 8.5gr, Max charge = 9.5gr Longshot
This is also what Lee has published in their 2019 manual as they get their data from others like Hodgdon.
Todays Hodgdon online manual list the following,
180gr SIE JHC, Start charge = 7.0gr, Max Charge = 8.2gr Longshot
It just so happens that this new online data for the 180gr Jacketed bullet is the same as their data for the 200gr Jacketed Bullet.
Start Charge = 7.0gr, Max Charge 8.2gr Longshot.
I contacted Hodgdon a couple times via Email to inquire about this, but have not received any reply.