Totto
If you firewall the TLs and pitch up to 15* while MLG still in contact (or sinks into contact ) with ground you will have a tailstrike pulling up through 8.9* on the 773, 10* on the 77W and 12.1* on all the 772s - (struts extended)
The 300 is a special case when it comes to TS & low level GAs.