One of my RL 15 5 # is marked Made in USA the other is marked made in Sweden, which seems to be slower. About 1 grain in my Whelen's to reach same speed and accuracy. Works great in the 5 Whelen's I have loaded for.
I noticed that anywhere from 55 grains to 60 grains has little to no accuracy difference in my rifle. I settled on 59.5 with zero signs of pressure. I’m going to chrony this and my AA2000MR loads shortly and will post same.