Hi Daniel, if none of the other suggestions work, I would contact Glock for advice/warranty service 770-432-1202 or email GLOCKCustomerService@glock.us
Good luck, stay safe, & have a great day!

Strip it, clean it, lube it, try different ammo. Glocks usually don't have this issue. Contact Glock and see what they say.

I'm most cases the magazine isn't the issue!
Like others have said. Most jamming comes from the how clean and lubed your gun is or defects in the ammo. Oil everything! (Not electrical or glass parts obviously) including the inner parts of the magazine to reduce friction. Additionally I always advise the use of premium ammo in the first 3-5 magazines. (If you build a mud truck... it's wise to test in a field before you dip into a lake!)

Hi Daniel and welcome. I would start out by marking the magazines to separate from carry and practice magazines. I would disassemble the pistol, clean and lube and retry with the same Blazer Brass ammo. If the results are the same, then try different ammo. This will help you narrow down if it is a bad batch of ammo, magazine issues or an issue with the pistol itself. Cheers and stay safe!

I hope you stripped her & cleaned and oiled back up before your first rounds down range. Also, w/o knowing your firearm experience there could be other reasons for the malfunctions.

did you field strip and clean before using Try different ammo. were you using different magazines