I just finished up testing with H1000 in the 25PRC. At .020 off 57.5 and 58 grains opened up. 56.5 and 57 almost over overlapped so I went with 57. I am switching to H1000 over N565. I was having to clean the barrel after 20-30 rounds due to groups opening up. In my experience with H1000 in a...