I have no issues loading 26 rounds into my gen 1 mag. The last 3 or 4 rounds get a little tougher but they all fit and feed fine. I only load to 25 now, though, and usually lock the bolt first before inserting the mag. Zero issues so far after 400 rounds.
Will wait for my gen 2 mags to come in and see if they make things better/worse/same.