26 bucks is cheap insurance. I don't reload, but I do have some experience where all the factors are not known to me and I have to go by the book for inspections because of the unknown.
For instance, the combined size or type of powder may cause unintended results and it may not be as simple...
My guess is yes. The only flat spot is the point. To make the bullet go forward the force would be applied at an angle where a greater amount of force would have to be applied at that angle for the same effect as if it were flat. Maybe?
I see the closed "system" point. I think it might slow...
I'm not an engineer, but the pressure vectors would be at obtuse angles to make that thing go out the barrel. I guess increased pressure and decreased velocity.