My old model 1907 is a unlocked breach recoil operated rifle so primers can be distorted by more then pressure as the bolt moves and case moves in the chamber .I have yet to run the 20 grain load of little gun over the chronograph . I am using trimmed .350 Legend cases deleting the small semi rim throwing another issue in the mix . A side is the pointed 140 FTX (sized at .351") is the same length as the original Winchester 180 grain soft point.
Thank you for the information about the longer pressure curve on Lilgun it is what I need and probably why the thick case is has soot on the forward part .