No matter how tight I wrap it, I apparently lack the skills to keep the paracord around the handle.
Soak the cord in warm water for five minutes before you wrap it tightly. Nylon absorbes water 15% by weight. In the process it stretches. When it drys it will shrink on your handle.
Same with a military cot. Wet and it assembles and comes apart easily. Dry and it it tight to sleep on.