Been using The Blue Bullets for about 6 months with no issues. I'm shooting the 147 RN with no lube ring out of an STI in 38 Super making 1200 fps so they easily handle major power factor. The perform great, leave no mess and are clean with only really powder smoke and nothing else when shot.
They leave no residue in the barrel after shooting.
Prices are great and can't beat the 3000 round USPS Medium Flat Rate pricing.