Factory ammo is designed to never get anywhere close to the start of the riflings. It is not unusual for some cartridges to not even fit in a rifles box magazine when they are set with the bullet close to the riflings, so they would then need to be fed into the chamber one at a time.
You are way to new to even be looking at a cartridge in those terms. Stick to the Manuals and down the road when your 2" group isn't pleasing then start to work with advanced adjustments.
Welcome to reloading, You Have a few mistakes to get through ahead of you if you are as Human as most of us are here.