heres the thing.

You have NO idea on where you are with your reloads without a chrono. Yes, you can shoot at paper all day and look for the best group, but what does that tell you about your load and what and where you are in terms of that loading curve?

If you always play it safe and use the low end, you maybe fine. but iirc, some loads dont like to be lightloaded where you may have some erratic results and from what i remember there are 2 points on that load where you will have a sweet spot.

i did without a chrono for a long time, but decided to buy a chorono since i reloaded for a friend and he wanted similar loads to factory or as close. So without knowing what velocity the factory was giving, its hart to know what my reloads will do.