I found acurites right next to each other to be pretty inconsistent, well outside of their listed accuracy range. I think their junk but the hobby seems to like them. Personally I would get a IR temp gun and forget about the Acurites.
Here's the cheap IR gun I use. I sell them at shows also. They seem to be pretty consistent across the board, I've had the opportunity to open 10 of them and they didn't read more than a half degree from each other and what my herpstat probes read, so that sold me on them. My more expensive pro exotics PE2 always seemed to be off compared to any other temp device I had. So even in my own husbandry I use the cheap one lol.
https://www.amazon.com/gp/product/B0...rch_detailpage