Most of my hand guns I own 5 or 6 for each one except my Zastava M57 and my new Sig P365. With those 2 to me, the Zastava is a range toy and I have to order magazines online to even get them, the P365 will be my carry, I only need a enough to practice and test as it won't be a dedicated range gun. Im getting an AR in the near future, I've already bought 4 30rd Pmags for it, I'll get a couple more but that's about 200 rds ready to go. How many more do I need for a range day where I bring a few firearms? Other than it saves a little time at the range since I won't have to reload the magazines as much. Is my thought process wrong?