I've used Remington GBs in my Marlin 60 for over 15 years and cannot remember a dud. Probably happened a couple times, but if it were more than once or twice, I'd remember it. I started using them in My M&P .22 pistol and have not had a single misfire.
If you're getting 30% misfires (or anywhere near that), I'd look at the gun.
My limited experience has been about 3 rounds out of 500 at the range that were duds. Far lower than 30%. It is dirty, but it is cheap. You get what you pay for.