Ok, this has happened to myself and 2 others in our shooting group.
First off call Volquartsen and talk to Scott or Nick and tell them what has happened.
Second, record the lot # of you ammo that created problems.
Third, get a round count of your ammo that has the same lot # as that which caused your magazine to explode.
Fourth, get your rifle sent to Volquartsen so it can be evaluated and, if needed, repaired.
Fifth, purchase A-17 ammo to use when the rifle is returned.
Six, contact CCI and get them to exchange your defective ammo.
I have shot well in excess of 10,000 rounds in my 17 HMR Volquartsen and my only issue, which had identical case head problems, and magazine explosions, as yours, was ammo related. And CCI and Federal replaced them.
As to the guy whose Volquartsens don’t work past 100 rounds, they obviously are not worth much so have him email me for possible sale.
You are a slow learner aren't you??