Using stupidly big gloves like 20 ounces aint doing you any favours.

Try hitting a bag for a round with them on, then try with just wraps on and you will see how much it affects your distance.

Just a half an inch out and that will make all the difference to the snap and power you put on your punches.

Also when your sparring you want your arms to feel light like they will when your fighting, heavy gloves should be used on the bags but sparring is for replicating a real match under controlled circumstances, which is why alot of top fighters kick the living shiit out o their sparring partners, no point going soft with no aggression then not be used to the pace of a real fight.