Hello Whisper,
Like in running a business it is location, location, and location, so it is with making a bullet propose, propose, and propose. What are you planning to do with this bullet, target shooting, metal silhouette shooting, or hunting? And where are you located?
Usually the trajectory of a subsonic bullet will do better with a 7-degree rebated boattail that is about ¾ of the bullets caliber, a nose shape of secant ogive, 3/4 power-law, and paraboloid, and a melpat diameter of between 0.10 to 0.15 of the bullets caliber. Now if you want to hunt with it that is another matter.
Donna :wink: