Firstly, the mags look good. A bit rough finish and the rounds have more friction when being extracted from the lip compared to my TI mags ( I can usually pop rounds out with my thumbnail but not with these). The H3CR's are also much larger than my other mags. They are so large that they do not fit in my mag pouches with the flap closed (too long).
Secondly, I interestingly noticed that I was able to fit a few extra rounds (beyond 25), not sure if this will affect performance.
Thirdly, they fit nice and snug in the mag well of my 10/22, not as "tight" as my TI mags but close!
Lastly, I note that the spare stripper clips (3 packs) come with rubber caps to prevent the rounds from escaping the clip. I wonder why the spare clip that was provided with the mags did not come with a rubber cap (maybe it is only supposed to serve as a "spare")? I must hunt down rubber bands for those now...
Can't wait to test em out further.