I have found a new tool in the quest to better understand load development and refine handloads. It is called Gordons Reloading Tool and is similar to Quickload in that it can provide pressure information, OBT nodes and is free. I've spent the last couple days measuring case lengths and finding water volumes of fired cases to see what kind of pressure and OBT results would be the output. I'm excited by what this tool offers in hopes that I can reduce the number of round robin loads shot during load development and get closer to a node right out of the gate. Does anyone use both GRT and Quickload? Are results similar?
What I'd like to know from those that have used GRT are:
1) Are you finding the OBT nodes accurate provided you plug in the proper cartridge lengths, case length, water volume and powder temp?
2) Are you finding the velocity on par with your chrono readings given the proper inputs mentioned above?
3) What is the best way to "baseline" results with what your chrono is stating? Is it best to increase/decrease case volume so that it matches up with your chrono readings?
I've found some results to be spot on while others to be off a fair bit. If you haven't checked this out, it's worth looking into in my opinion. For now, I'll continue working up to loads until I have better confidence in this software.
You can download the tool here after registering. It will run on both Linux and Windows:
https://grtools.de