Lucky Gunner has a fascinating article about TulAmmo. Highly recommended read.
BTW, buy some ammo from them. They are good folks and one of the few vendors that was willing to work with California gun owners when there was uncertainty about whether AB962 would be overturned. I had some personal contacts with them, and they were genuinely interested in pushing the envelope of that stupid law, while still remaining legal. They didn't take the cop out like Cheaper Than Dirt and Sportsman's Guide did.
And no, they don't pay me or endorse me. I am just a happy customer.