I've looked in many different places, but I can't find any listing for the load limit on Warbonnet 1.7 oz Blackbird. I read in a recent review the 1.1 oz was rated for 175#.
However, I range from 220 to 260 depending on time of year (end of school in May is close to 260; after a summer walking, I'm more like 220).
I use a Hennessy Expedition rated to 250 and have never had any problems, even when I was in the 260 range. Would the 1.7 oz Warbonnet Blackbird with with the webbing cinch system be safe at that weight?