Yes it is legal in ITSF rules. Just look up a few matches on youtube.com and you will see people that shoot a "pull" shot which is exactly what you describe. That does not make you wrong just different rules. Maybe explain how you play and alternate which rules you are playing by? I would equate to boxing vs kick boxing...the playing environment is the same but a significant rules difference.
Thank You for your answer,
as we are going to have the annual tournament in the office, i'd like to approach the problem like this, once all participants are confirmed, i'd create a poll to vote on which style to play with.
Italian Style, ITSF with pull shoots and hooks, snakes shoot, stop and shoot and so on, so that at least during the tournament it's clear what is allowed and what not, what do you think?