Missouri 9mm cast issues.

[ray15]

One last question, where do I safely start my charge? I'm using Titegroup and was running 4.4 gr at 1.135". Now that I'm at 1.065" Titegroup indicates the starting charge is 3.9" for LRN at 1.100".

This is a guessing game without knowing the length of the bullets. The MBC bullet may be 0.035" shorter than whatever is in your load data at 1.100", meaning the seating depth may be no deeper and little to no charge adjustment is necessary. If it's really seated .035" deeper (big if) you would want to back off ~0.2gr.

If you can supply the length of the bullets you were using at 1.135" and the length of the MBCs I will model it in Quickload and see what charge adjustment to make to your existing 4.4gr. load.

 

[ArchAngelCD]

One last question, where do I safely start my charge? I'm using Titegroup and was running 4.4 gr at 1.135". Now that I'm at 1.065" Titegroup indicates the starting charge is 3.9" for LRN at 1.100".

You could probably still start with 3.9gr since the max is 4.3gr although I'm no fan of Titegroup.