Hi Wooden Frog.
As you know any coax is ok for RX.
To a point, that is true. However, attenuation losses and impedance mismatch losses still accrue and are more critical for good RX as on TX power can be increased to compensate for the losses. Not so for RX. "You can't work 'em if you can't hear 'em."
As with any coax as well, as long as the SWR is ok you should be fine.
It is possible for a coax to have enough loss over its length to present an acceptable SWR and yet all the power is lost in the coax. A 50 ohm dummy load also presents an acceptable SWR, but does not radiate as well as an antenna. For background, an excellent reference is Walt Maxwell's, W2DU,
Reflections III (
available from CQ Communications), the chapter titled, "Too Low an SWR Can Kill You".
For mobile use at frequencies below 450 MHz, good quality RG-58 type coax is an acceptable trade-off between ease of installation and performance. At lengths of less than 15 feet (typical for most mobile installations) the loss will be much less than 3 dB at 70cm (remember that each dB is a factor of approximately 1.26 and that a rule of thumb is that 3 dB represents a halving or doubling of power).
For home use and any run over 20 feet or so, look for the lowest loss cable you can afford. At a minimum, for a run less than 100 feet, RG-213 type cable is adequate.
Times Microwave makes some excellent cable that approaches hard line in its performance but proper connector installation may require some special tools that nearly double the cost of the coax run! If you're going to make multiple installations, the tools will pay for themselves over time. Or a group could buy a set and share them.
An alternative is Belden 9913 which is an air dielectric cable but beware! It must be sealed very well to prevent water ingress and migration.
If your run is between 100 and 250 feet or so, then 1/2" Heliax starts to look attractive and the connectors can be installed with some simple hand tools.
There are many choices, but the goal for good performance at VHF and above is to obtain the lowest loss you can afford. As Tracker says, "Have fun".
And to answer your original question, there will be no harm using the RG-58 to test so long as the Arrow antenna is presenting an impedance near 50 ohms (between 25 and 100 is fine) which it should since those are pre-cut as I recall.
