It's a Production Red. Production Reds are produced by hatcheries crossing red gene roosters (RIR, NH, or PR) with red gene hens (RIR, NH, or PR). In truth with hatcheries, there is little or no difference between their RIRs, HNs, and PRs. If the feathers of the offspring tend darker red (mahogany) and they have black feathers in their tails, the hatcheries label them RIRs. If the feathers of the offspring tend toward lighter red (chestnut) and they have black feathers in the tails, the hatcheries label them NHs. If the feathers are somewhere in an in-between shade of red, or if they are very uneven in their red color, or if there are no black feathers in their tails, the hatcheries label them Production Reds. Your pullet's red feathers are light enough and since she has black feathers in her tail, MM might have labeled her a New Hampshire. No matter what label she was sold under, you should get lots of large, brown eggs from her.
