I have been reloading 300 blackout using the supersonic j things but I finally am ready to start working up loads for subsonic loads using the NOE 247 grain 311 bullet. These will be sized to 310 and be lubed with Ben's red. the target gun for this load will be an AR with a 16" barrel and a carbine gas system. I understand that cycling with that gas port may be an issue on this without a can.
This will be my first time "working down" a load and wanted to make sure that I have my ducks in a row. Currently I have a very little a1680 and more 'lil gun on hand. I was looking around and couldn't find a starting load for these two powders with that bullet. Is there anyone loading these today that might be able to provide a starting point for charges to work from?
Thanks in advance for the advice.