Good advice already.
I shoot flats and tubes and solid round latex. I usually aim for cut that's about 1/4 my draw length. But like @Craigbutnotreally said, the lighter stuff often get more stretch than the heavy stuff. It's pretty well accepted that more stretch provides more performance at the cost of durability. And, in my humble option, the less aggresive stretch ratios just seem more consistent.
Target and plinking setups are often set up with less stretch than hunting setups. The exception being if the lower stretch setup drops the point of impact behind the top fork - then trimming the latex will add speed and raise the point of impact.
As previously mentioned, starting with a longer cut and trimming to find your sweet spot is a time honored path to happiness.
Enjoy the journey!