Here is a quick note...
1x10 been std for subgun barrels since WW2,,, common pistol is 1x16,, Berreta 92/M9 is 1x10... 147gr fly just fine from 1x16 or 1x10.
Me,, I prefer common 1x10, that what my Uzi pipe is, and same for my M11-9 barrel I had cut from stainless blank.