I've been practicing with my Colt magazine AR9, and I've found that the 32 round magazines are so long that they are hard to guide into the magwell when I try to reload the gun like my handgun. I imagine when I put an extension on there that it's just going to get harder to align properly. I experimented last night with a typical "beer can" grip rifle reload and I seemed to have more success with it, even saving around half a second on my reloads with that method. With a little bit of grip tape on the magazine, I can also reliably seat the magazine.
So I guess my question here is: how does everyone perform their reloads? Is there any particular disadvantage to doing a reload as I describe?