20 April 2022
The only published criteria is for a safe trigger pull. Personally, I do not care as much for the poundage requirement as I do for the crispness of the trigger pull. I'll get used to a 4 1/2 pound pull that is crisp. Also, you can disassemble and polish the inner parts to reduce friction and get a quicker firing pin strike.
The two-stage trigger is in itself a safety feature. You pull until you feel the increased resistance, then settle in for a final sight and squeeze.
When you rebarrel, you can adjust the length of the chamber and the leade more precisely than an ordnance man in the field. You can get a minimum factory chamber to aid in accuracy.
This has been discussed over the years, as a way to gain an advantage, but there is no way to tell. When you have a Springfield Arsenal receiver with a Smith-Corona barrel, it is rebarreled. If in the field at an ordnance depot during wartime or the local gunsmith during peacetime cannot be told.
Farm boy from Illinois, living in the magical Pacific Northwest