If she cant handle a sufficient load to kill and not just wound a turkey, dont let her shoot this year... Its selfish to rush your kid into shooting if they are not comfortable, and irresponsible to try and shoot a turkey with some lower powered shot out of a 20ga... Turkeys are tough, sometimes a full power 12 ga doesnt always knock them down. Just wait till next year or beyond, spend this time at the range getting your daughter used to shooting a full power 20ga turkey load.