I will admit it is some what debated often however there have been noted sections in the FAQ’s (rules book i believe) that states the choice of, what occurs first at the start of the turn is up to the player.

But if someone argues this then think of it like this: argue that at the start of the game both players “DEPLOY” forces and so this is considered moving onto the board from off the board edge. Your movement phase is then conducted after deploying. Same is said for Deep Striking as well, as it states you cannot move after deep striking, but may shoot/run, but cannot charge. That should be a clear understanding in my opinion.

However, I have seen situations of models arriving in the shooting phase that are psykers. I would state that they do not have ‘warp charge’ because this occurred after the start of the turn. Such as daemons appearing mid battle (most notably Tzeentch) in the shooting phase or assault phase.

If people agree great! If not I would say it’s up to you and your opponent to discuss this before playing.