Performance using Spring RabbitMQ is slow - rabbitmq

Question

I am trying to send a 51MB of data over 13 threads to another machine in a gap of 30 seconds. It means, at every 30 seconds, 51*13 = 663Mb of data is sent in a burst to the target machine.
Steps Followed:
I have used shovels between the sender and the receiver rabbitmq server to transmit the messages.
Both sender and receiver have their own rabbitMq server running.
I am using RabbitTemplate.send(routingKey,51mbMessage) to send the message.
I am using OnMessageListener on the target machine to receive the messages.
OnMessageListener at Receiver side:
<rabbit:listener-container connection-factory="connectionFactory" prefetch="10" >
<rabbit:listener ref="onMessageReceiverforMyTestQueue" queue- names="MyTestQueue" />
</rabbit:listener-container>
<bean id = "onMessageReceiverforLoadTestQueue" class="MyPackage.MyMessageListener">
</bean>
ConnectionFactory at the receiver side:
class="org.springframework.amqp.rabbit.connection.CachingConnectionFactory">
<constructor-arg value="***.**.**.**"/>
<property name="username" value="abcd"/>
<property name="password" value="abcd"/>
<property name="channelCacheSize" value="50"/>
Observations Made:
The messages are taking lot of time to reach the target machine.I am getting delay of about 10-15 minutes.
Can you please help me in overcoming this delay. I would really appreciate any help offered here. Thanks in advance.