it says that this is a 16+1 round magazine, but that 16th round IS NOT fitting.
Is there a trick to loading my magazine that I'm missing?
Join FirearmsTalk.com Today - It's Free!
Are you a firearms enthusiast? Then we hope you will join the community. You will gain access to post, create threads, private message, upload images, join groups and more.
Firearms Talk is owned and operated by fellow firearms enthusiasts. We strive to offer a non-commercial community to learn and share information.
Join FirearmsTalk.com Today! - Click Here
It's probably a stiff spring that is not allowing your last round.
The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants. Thomas Jefferson
The best cure for this issue is a mag loader. Glocks and XDs often come with them, and I'd imagine those would fit your Sigma mags just fine. You can sometimes find them for next to nothing used. But if you buy/order one new, get a Maglula UpLULA.
I wouldn't even bother trying to fill it up all the way, just seems like if you leave one round out then that's a little less stress on the spring.
If it won't load 16 then load only 15, don't force it. If you did manage to get the 16th loaded, it probably won't feed the first round.