I shoot 2-3/4", sub 7K reloads in my 20ga 2-1/2" Damascus Flues.
K Kearcher mapped the wall thicknesses for me years ago.
Tom A did the pressure verification on the load.
I sleep well the night before I take it out! smile
All my 2-1/2" vintage guns are fed, tested 2-3/4" low pressure loads.

JMO, I would never assume a published load was as low as stated without independent verification. Years ago Alliant published a load with Proreach in 28ga showing a pressure of 8450psi. Independent tests showed the load was WAY above that number. Alliant pulled the data.
The fee Tom A and Precision Reloading charge is money well spent.

Last edited by ithaca1; 12/15/21 11:00 AM.
Bill Johnson