Absolutely yes is the answer to that question. Please, please, please clean those rifles as soon as possible. There is simply no reason to temp fate here. Take a couple of alcohol or windex (even windex + alcohol) patches and swab that barrel. Then run a couple dry patches followed by a lightly oiled patch (CLP, Shealth, RemOil, even WD40) and SLEEP WELL!!!!

REMEMBER:
Cleaning adirty barrel is just like having sex...it is far better to know you're protected than to hope nothing badwill result afterwards.