I think doubling here automatically assumes that 3N is a lock, and that clubs are running. With my stiff club, I think thats far from obvious.
Frequently, RHO will hold essentially a strong NT with 3 or 4 clubs. But the odd are are more likely that RHO has 2 clubs, and the 3-1 or 4-1 club split will be a nasty surprise. RHO also understands the value of bidding a sketchy vul game.
I think double could push them into an impossible 4N or 5♣. But on balance, I hate giving up -300 or -500 against a plus at IMPs.

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