Bar-Sto BHP barrels used th have a 'hump' machined into the barrel feed ramp...don't know if they still do, or not.
The 'hump' in an aftermarket barrel like Bar-Sto may/may not affect feed reliability.
Viewing their CD regarding fitting of barrels is worthwhile for what it says and doesn't say.
Respectfully suggest visiting Sterphen A. Camp's website 'Highpowers and Handguns'. Put on a pot of coffee, relax and enjoy.
The BHP was, and is, good stuff.
salty