Mr Wynn -Welcome !
• In the CZ's I've tested (P-01 & SP-01), the Berry RN
(115, 124, 130, 135 and
147gr) will allow the OAL to be anything you want. True
, other bullets are not that forgiving, but the Berry series of RN is
. So as a beginning reloader, you are either paying attention to this forum or you lucked out! Congrats either way!
• As to loads, you should train yourself to rely on published data
from the powder maker's web site. In this case for Tite Group
it would be on the Hodgdon
web site. RIGHT HERE
. Seeking help is fine. Seeking second opinions is fine. Asking questions about the data is great. But for your load info, please learn to go directly to the source.
125 GR. SIE FMJ Hodgdon Titegroup .355" 1.090" 4.1 1069 27,300 CUP 4.4 1136 30,600 CUP
a) We use the FMJ data because the Berry web site tells us to in their FAQ section.
b) The OAL Hodgdon lists (1.090") is the minimum safe
OAL with the load shown. Therefore, you can always go longer,
because this will reduce chamber pressure and be safer. So in this case, you can use anything between 1.090" and 1.169" (the SAAMI max length for 9x19). Personally, I'd guide you toward an OAL of something like 1.130" to improve feeding.
• Finally, you always begin with the "starting load" and work up slowly in small increments. (In this case, increments of 0.1gr.) Just because 4.2gr works great in my CZ doesn't amount to a hill of beans for you. Each gun is different. Each scale is different. My "4.3gr load" might be equaled by 4.1gr as measured on your scale and used in your gun. Follow? So everyone starts at the beginning.
With a powder that only has a load window of 0.4gr there is NOT much room for error. Each and every load must be precisely made. On a new reloading setup, this is going to be a skill you have not yet mastered. Time will certainly cure this, if you don't blow yourself up in the interim.
I hate to sound so pessimistic, but Tite Group is a quirky powder. IMHO whoever recommended Tite Group to a beginning reloader is no friend. Luckily you've got some GREAT equipment there to help you.
• Read a lot. Ask lots of questions. Go slow. Double check all your loads before seating the bullet. Use markers, tape and sandwich bags to segregate and clearly identify
all your loads. You can do this.
All the best.