Some guns are more prone to bullet set back. atleast quicker than other designs. this is a cartridge that had been loaded approx. 8-10 times(I think) in my Springfield Armory Champion 1911 4". It is a one piece feed ramp which is steep. The ammo doesn't easily feed during hand loading, although functions flawlessly shooting.
I noticed this after clearing my pistol to do the routine monthly cleaning . I believe this cartridge got mixed with newer ammo. Typically I try to rotate out my ammo every 3-4 months to avoid this type of problem. I have found setback in other cartridges, but never this severe.
A brand new Fed hydrashock measures 1.206 COL
The set back hydrashock measures 1.122 COL
Lesson here, check your carry ammo. the more you load/unload the more likely you will see bullet setback soon.