Ramshot's book says for plated 147gr PLATED bullet is 2.6gr starting and 3.0gr max.
I started doing 2.6, 2.8 and 3.0 none could cycle my stock glock 34. i looked at the primers and there was no sign of overpressure at 3.0gr grains.
So then i went to 3.2 and 3.4 and still could not cycle and no signs of overpressure. At this point accuracy was starting to get better as well.
I stopped at 3.6gr at 1.135 OAL when the gun cycled 100% with no signs of overpressure on the primer.
I've loaded over 10,000 loads with this data.
147gr Xtreme plated round nose
3.6gr Ramshot comp
1.135 OAL
mixed brass
tula, win, fed, and cci primers used.