I think you’re asking the wrong questions here. if you want a bow solely to practice with and to make YOU a better shooter with your main hunting setup, why would you want a bow that was more accurate? Learning to shoot accurately with a less forgiving setup would make you a better shooter.
If you want to shoot 3D archery or indoor archery or something that’s a different story. Competing will make you much better with your bow (unless you get target panic!) and it’s a boatload of fun. Most serious 3D shoots will have a speed limit on bows because the higher speed allows more room for error on guessing yardages. Your bow won’t be shooting near that fast with your weight and draw…
I guess to answer your question, yes, a lighter arrow traveling faster will be more forgiving in the vertical plane because the arrow drops slower. It won’t be any more forgiving right to left though.
here’s my thought, if you really want to have an accurate bow, and be accurate with it: Invest time in YOURSELF. Practice right every day.Don’t go bomb 100 arrows at rapid speed and think it’s all about quantity. Shoot 15 arrows and consciously draw and float the pin on the bullseye for several seconds while easing into your release. If you find yourself about to punch the trigger or floating off target just let down. It’s all about quality in practice.
Learn more about tuning your bow yourself, don’t just count on paper tuning at the bow shop and sticking any arrow in it. Learn what the difference between dynamic spine and static spine is and what you need. Tune your bow perfectly with 4 different methods then change rests. Watch hours and hours of content on bow tuning and then go try some of it.
In my opinion archery is the kind of sport where the gear has a lot to do with how good you are. If you give Levi Morgan an old wheel bow and a mix matched quiver of Craigslist arrows he might still be pretty good, but he won’t look like the best in the world. LEARN about building arrows. I think that’s where accuracy really lies.
It takes time brother and lots of patience, if you want to solely work on your release I really recommend making a loop of paracord around something similar to your bow grip and dry firing your release a lot.