Unfortunately, no pump can empty your breasts like a baby. That is the same amount that I get, but my supply is low due to hormonal issues.
I'm not sure about pumping and dumping, sorry.
Below is an email that I got from a lactation consultant regarding boosting milk production. I hope it helps you!
Increasing Milk Production​
If you are trying to increase your milk volume, here are some tips that might help:
Breastfeed your baby frequently, 8-12 times per day. Wake your baby for feedings every 2-3 hours if he doesnt wake up on his own.
Hold your baby close, skin to skin contact is best, and it has been shown to increase milk production, even if you are exclusively pumping. ( Hurst, N., Valentine, C., Renfro, L., et al. Skin-to-skin holding in the neonatal intensive care unit influences maternal milk volume. J Perinatol 1997 May-Jun; 17(3):213-7.)
Place a warm wet compress on your breast for several minutes before feeding and/ or pumping. In addition, warming the breast shields before you pump can help you pump more milk.
Massage your breast for a few minutes before feeding and/or pumping. Here is a web site with a video demonstrating massage techniques (click on the Maximizing Milk Production) https://newborns.stanford.edu/Breastfeeding/
If you are exclusively pumping, try power pumping, pumping more frequently but for shorter periods of time. Here is a link with more instructions on power pumping: https://www.lowmilksupply.org/powerpumping.shtml
Another version of power pumping is to pump for 10 minutes, take a 10 minute break, pump another 10 minutes, then break, etc, for one hour. Do this once a day.
If you are pumping frequently, dont worry about washing your pump parts after every pumping. Place all bottles and breastshields, etc, in a Ziploc and store in the refrigerator between pumping sessions. Be sure to warm your breast shields before pumping.
Using massage and compression as you breastfeed, will help your baby to get more breast milk at the breast, as well as increase the amount of hind milk the baby takes at the breast. (Jones, E., Dimmock, P., Spencer, S. A randomized controlled trial to compare methods of milk expression after preterm delivery. Arch Dis Child Fetal Neonatal Ed 2001; 85:F91-F95.)
Massaging as you pump will help increase the amount you pump as well. Using a hands free bra while pumping will make massaging as you pump easier. There are several types available, including the Easy Expressions bra by Medela, or one made by Simple Wishes.
www.simplewishes.com
Eat healthy whole grains, such as oatmeal, flax and barley. Here is a recipe for cookies that contain healthy grains:
https://www.food.com/recipe/oatmeal-chocolate-chip-lactation-cookies-by-noel-trujillo-192346
You might benefit from taking some herbal galatagogues.
Motherlove makes 2 which are often effective, More Milk Plus and More Milk Special Blend. Use the Special Blend if you have smaller breasts, or have had breast implants, or breast surgery. More Milk Plus can be found at Walgreens, Sprouts and Nurtured Family. Go to
www.motherlove.com to find other suppliers.
Other herbs to try, malunggay, shatavari, and fenugreek. Information about each of these can be found at: https://www.golacta.com/ and https://www.lowmilksupply.org/shatavari.shtml; https://www.breastfeedinginc.ca/content.php?pagename=doc-HRMS
Domperidone information: https://www.breastfeedinginc.ca/content.php?pagename=doc-DGS
I have no evidence for this, but many moms report drinking Gatorade everyday helps. Try drinking 32 ounces per day.
If you have to supplement your baby after breastfeeding, make sure you pump your breasts the same number of times as you supplement. Use any breast milk that you are able to express first, for the supplements, then formula if no expressed breast milk is available. As your milk production increases, you can gradually decrease the amount of formula you are giving your baby. Always keep regular weight checks at your babys doctors office to make sure your baby is getting enough to eat and is gaining weight as expected.
Consider renting a hospital grade breast pump. Hospital grade breast pumps are more effective at emptying your breasts, and therefore more effective at increasing milk production.
Make sure you do not wear a restrictive bra, or one that is too tight. Sleeping on your stomach at night might affect your milk production.
These recommendations are provided as a reference only, for education and information regarding breastfeeding.
You should always consult your primary health care provider first, if you are concerned about the health and well being of yourself or your infant.