Well, paranoia aside, I have never touched my bowstring with a broadhead in five decades of hunting; if I did, it didn't hurt even one strand of B-36, B-43, B-50 that I ever used....respectively. Of course I may have been lucky. :rolleyes:
I hunt, and have hunted, in some pretty funky stuff; limestone boulders, devil's club, multiflora rose thickets, and I have used my bow to push my way through some pine boughs, etc. I've never hurt a string of any kind by such adventures. At least not to the point off rendering it useless. :p
The newer material is also tougher against abrasion and cutting then my old stand by strings, and I don't know what else I could do to my bow and string to create such a terrible strain as to negate the use of less strands. Just me.
I was a little apprehensive at first as well, but used the skinny string all year (6 strands 450...12 strands in loop). The string looks as good as any other in my possession, and I expect it could go another season rather easily.
As for keeping another handy? I do that anyway. Heck I never go past the back yard without a spare string.....a habit I started on good advice in 1965.
Skinny strings don't scare me. Biting dogs, rattlesnakes, and mama bears with cubs do. And of course, those mean gray squirrels. Can't trust em' I tell ya'.....can't trust em'. :eek: :D