|Originally Posted By RedFalconBill:
Originally Posted By ns66:
when a cartridge is designed, obviously bullet diameter is specified, does the bore diameter is also fixed (part of the spec)? or it can be shot in various bore diameter?
Essentially, the bore diameter is fixed because the rifling depth is fixed.
.22's have ~0.005" to 0.006"
6mm's and .25's have ~0.006" to 0.007"
6.5mm's have ~0.007"
.27's have ~0.007" to 0.008"
7mm's, 7.62mm's have ~0.008"
so rifling depth is in the spec? i am just curious if one can shoot a round in barrels with slightly different bore diameters