I think Ted Fry coined the phrase, "classical archery", for wood bow archery in the era just before fiberglass, when modern tools, finishes, and strings were coming about, and arrows were being made from manufactured dowels. That description fits my style better than "primitive", which I reserve for wooden bows with natural finishes, glues, strings, and arrows processed from the same. In any case, my favorite bowstring material is Dynaflight 97.
Unlike linen, which has a short life and is prone to breakage, and B-50, which creeps and requires frequent twisting and retuning, D-97 has a very low stretch, is extremely durable, stable, and is quite affordable in the superstring realm. No fuss, no muss. Those with just one bow and a broader interest in primitive things may well be tolerant of the upkeep required with primitive string materials. I'm not. I've used D-97 on all my bows (50-70# typically) for 8 yrs without any detriment. In fact, I feel B-50, with it's tendency to stretch, is much more apt to do damage during early, low brace tillering, when the bow is braced, the string stretches, and the angle of the string becomes so acute that it tends to split the limb along its length.
The trouble in using D-97 with some glass laminated bows is that if the limb tips are very thin and not reinforced with an overlay, they could shear without the stretchy cushion of B-50. This is not an issue with selfbows that generally have much thicker limb tips and are stronger.
