It is my opinion that all 22LR have priming compound placed in the rim when they leave the factory.
However, depending on transportation/shipping/handling, especially bulk "loose" 22LR could be more susceptible to hard trucking vibration/shock of driving over potholes to have priming compound move away from rim. If you see priming compound mixed in with powder, that's likely what happened to cause FTF.
Another factor is age of ammunition, post purchase handling and storage conditions.
During past 3 years, I shot over 28,000 rounds of various brand/weight 22LR out of several 10/22s and ARs using CMMG 22LR conversion bolts. Ammunition varied in age with some more than 10 years old but few rounds per 500 bulk box of FTF I experienced did not correlate with age of ammunition. And some boxed CCI SV and Blazer that were more than 10 years old were 100% reliable.
And when I conducted close to 6000 round "Real World ... break in" test with new 10/22 and T/CR22 using 20 different ammunition purchased within 6 months to 2 years, I had 100% reliability (Including the dreaded Thunderbolt) until at the end of 6000 round testing where fouling/gunk build up needed cleaning and 100% reliability returned after cleaning.
Of course, my limited sample size with isolated two firearms so your experience with particular lot of ammunition in your firearms may vary.