I did a some testing with few different barrels
30 Herrett
old frame .002 New frame jamed shut difficult to open
7 tcu
old frame .006 new frame .0015
22lr
old frame .002 new frame jamed shut difficult to open
22 match
old frame .008 new frame .0035
22 hornet
old frame .004 new frame .000
The difficult to opens sometimes required removel of the hinge pin to get the barrel open.
kinda a pain in the butt process and I give up after 5 barrels but Brings me to the conclusion that all barrels and frames may not be 100% interchangeble , I seem to have some barrels that are better suited to use on paticular frames .