I dont think it would be a problem if you have it at a slightly higher brace and just left it strung for 10-15 mins before shooting, Its less stretchy than my nylon cord i use for my bows atm. I have 40 lb test string, but it was able to hold a 45lb bow. And when shot it was fine. I also had knots in it, which supposedly halved the strength of the string... so 20 lb bow string on a 45 lb bow. Paracord will work fine! i actually have used it, it barely stretches(maybe a bit more than Dacron but stops after full stretch. meaning it only stretches while its braced after it just doesnt move.) hope this helps. If nothing else, someone may be willing to trade you a string or something.