Jim Thanks for your input....But Berrys site has been part of the confusion to be honest.
"...we have found best results using low- to mid-range jacketed data in the load manual. You MUST use data for a bullet that has the SAME WEIGHT AND PROFILE as the one you are loading."
Very clear...but how many other 124 Gr HBFP bullets are there...jacketed or not?
They go on to state....
"Do not EXCEED mid-range loads"
Then they say...
"We recommend using hard cast load data or START with mid-range jacketed data..."
So I can start at but not exceed mid range jacketed loads????
"...our plated bullet has the same pressure curve as a hard cast bullet, the PUBLISHED cast data will be very close to what you will get..."
Hodgdon only lists 2 loads for Tightgroup that are close
125 GR. LCN start 3.6 max 4.0
125 GR. SIE FMJ start 4.1 max 4.4
so my range should be 3.6 to 4.25?
I have loaded around 5000 rounds of my Makarov since 96...was shown how by a friend (RIP JT) and just changed nothing....I have had no problems...but In researching info to load the luger I have both scared and educated myself.
My 9x18 load is .4 grains (all most 10%) over max of any data I can find