Usually if the weather permits, I usually spend 3-5 days of the week either practicing serving for 1-2 hours or hit againt the wall for 1-2 hours. I have a bunch, well not a bunch but 10-20 semi-dead balls. I rarely spend money buying cans of balls. I recently read about pressureless balls and it caugh my attention b/c its supposed to be really durable. However, some people say they are heavier than regular pressurized ball. My question is it benefitial to practice serve/hit against wall with pressureless balls. Or should I just stick to my semi dead balls?