The properties of coax cable changes if the center conductor is not in the physical center. The typical shield used on two-way radio communication cables is a woven braid. For the most part, it is formed with either bare or tinned copper wire and is a very important consideration when trying to determine the quality of the coax. Low percent coax has a loose braid and exposes more of the center conductor to leakage. Unfortunately, the cable industry did not invent a coding system that designates the type and percentage of shielding used to build the coax.
Shielding percentage is the most abused part of the coaxial cable manufacturing process.
Using anything less is the equivalent of watering your lawn with a hose that is full of holes and has a restricted opening. You must exercise caution when it comes to shielding. They have argued with us on many occasions regarding this matter. They say that if your system is set-up properly that the length of the coax is irrelevant. However, mobile installations have so many variables that a perfect set-up is the exception, not the rule.