I am really sorry you're going through this stressful ordeal at this time of year. My previous offer to look up data from your store to help make your case that you're working your butt off still stands.
To answer your question, there isn't a corporate guideline for how many DPCIs per hour you can Pull & Stock. That is because there is too much variability between fill groups and stores to create a guideline that applies universally. However, with store specific considerations taken into account, it is possible to create a bell curve distribution of poor performers, average performers, and high performers, and see where you fall.
But even then, you have consider your fill group. A person pulling within 1 or 2 aisles of OTC, is going to have a much better UPH than a personal pulling Household paper, who has to go up and down on a wave pulling from bulk locations. Are you pulling a lot of cases vs openstock, are you going up and down ladders a lot? These questions and more have to be answered.
To possibly assist you in making your case, I will share some anonymized Fill data from my store, which tends to do between $75-83m/year in sales.
In the last 30 days, we have had 29 TMs pull more than 1,000 DPCIs. The average productivity for the store during that period ~126.5 DPCI's per hour. Interestingly, the average productivity of those 29 top pullers was 125.2. This is strictly time in the pull application pulling, not stocking.
As we can see from this chart, most people, including the top Fillers have productivity between 100 and 200 DPCIs per hour. Most of these users are in Food and GM. Interestingly, the top 2 pullers are GM, and they pull the most varied batches throughout the store. Think Essentials, Home and Stationery, Toy/Sports, etc. Which means they have the most movement between different stockroom aisles and sales floor locations. So a Fill UPH of 130-160 is more than reasonable. When you factor in stocking time, it's much closer to 60-80 DPCIs per hour.
Now factor in Fulfillment backup, backup cashiering, zoning, guest assistance and anything else, it'll be even lower. So let's just say 50 DPCIs per hour. Over an 8 hour shift, that would be 400 DPCIs Pulled and Stocked. Yet, over the last 30 days, nobody in my store pulled more than 300 DPCIs in a single shift. No one.
I expanded the dataset to include the entire district, which is one of the higher volume districts in the company. Only 15.5% of pullers who had more than 1000 DPCIs pulled in the last 30 days pulled at a rate higher than 200 UPH.
I hope this information is useful to you. Good luck and let me know if I can assist you further.