I did a bore/throat diameter measurements check on my '51 & 61 Navy and '62 Police Uberti's. The throats measured .371.5, .373 and .3735 respectively. The bores (land to land) measured .359, .3605 & .359, again respectively. These measurements were made with pin gauges and I'm fairly confident in their accuracy. I slugged the bores and they measured, groove to groove, as .3765, .377 and .378. I am less sure of those measurements. Uberti specs say that the bore is .360 and the grove diameter is .379. Has anyone else checked the grove to grove diameter on their uberti's? What's the consensus on a round ball bumping up from a throat diameter of say .373 to a grove diameter of Uberti's claimed .379? Or my measured .377 +/- My thoughts here concern the benefits of reaming the cylinder throats out to more closely match the groove diameter.