The 25 yard group size should be 1/2 the size of the 50 yard group size & it is not. This tells me this is not a good load for this rifle as at 25 yards it should put all of them touching each other or dang near it.
Also, you should be sandbagging the rifle on the front & rear & from a good solid bench to find a good load & eliminate the human error. You can shoot offhand all ya want after ya find a load, but to cut the chase getting the right load, sandbagging the rifle will save you a lot of time. The idea is to find what the rifle itself will do, not what you can hold.