Thanks everyone for answers, I decided to carry 60 decks on the plane. And the rest in my baggage.
Hope it's fine when I pass the scanning machine.
When traveling by plane from NYC to Fort Lauderdale, FL last year, I had no problems. On the return trip, the Transportation Safety Administration (TSA) agents asked to inspect my briefcase containing over 100 decks of cards. I opened the case carefully so as to not make any sudden movements that would "upset" the nice (armed) agents, and once it was open it was pretty clear what was inside. They did a swab test for explosives anyway, and it was negative. Apparently the guy who spotted it on the X-ray was a newbie and didn't recognized what a whole mess of playing cards looks like through the screen - one of the other agents was busting his chops, saying that what she thought it was...
It could have been worse, though - I heard Jason Brumbalow was traveling while wearing Pure Smoke and got stopped by agents...
And as far as your body weight being below 46kg - you must be a waif! In a strong wind you'd take off like a leaf!