Where I work we run a fluid bolus via pump @ 999 ml/hr. That's the highest rate for the pumps we use. If you have maintenance fluids ordered after the bolus, I piggyback the bolus, with the bag of maintenance fluids hanging as the primary to pick up when the bolus is complete.
as for heparin bolus, your facility should have policy/procedure for heparin infusion. i wanna say i've seen bolus over 10 minutes followed by a weight based drip. this would also depend on physician preference.
and there are no stupid questions -- i've been told that the most dangerous nurse is the one who doesn't ask questions....
my preceptor gave me the best advice - "know what you don't know, and know who you can ask"
hope this helps, interested to see how many other ways there are to bolus a pt.