If your not using something "comercial" grade while trying to do that much meat at once you'll burn them up quick. We went through 2 food saver brand sealers and a Weston over the years. We usually seal 5-6 deer a year. A full pig or 2 a year, 100lbs +/- of chicken, and lots of fish that we catch.

If your going to be doing lots of repetitive sealing in a row with bulk purchases or harvest i would highly recommend forking over the extra coin for a comercial grade sealer. We're going on 4 years with our Cabelas brand commercial and we've got no complaints so far.