Could someone explain what the forward driving band is on a round of ammo please?
I ask because someone on another board stated that the rim thickness of a round of 22lr ammo does not allow a bolt to close easily on a Cooper 57M has nothing to do with the rim thickness of CCI SV vs SK Standard Plus but the forward driving band. When I look at the rim of a CCI SV round & a round of SK Standard Plus (after I take my contacts out) the SK looks a tad thinner.
What am I missing?
Maxwell
I ask because someone on another board stated that the rim thickness of a round of 22lr ammo does not allow a bolt to close easily on a Cooper 57M has nothing to do with the rim thickness of CCI SV vs SK Standard Plus but the forward driving band. When I look at the rim of a CCI SV round & a round of SK Standard Plus (after I take my contacts out) the SK looks a tad thinner.
What am I missing?
Maxwell