I have the mark v ULW and the accuracy results were less than desirable. 2”-3” @ 100 yds. I’ve tried all the factory loads, I don’t handload, and only the 127 gr Barnes LRX are accurate for my rifle. They are 1/2” or less @ 100 yds. I consistently put 3 shot groups at 500 yds in 3-5”. I believe it was member OregonmarkV who told me a year ago to stop trying other loads when I have such great accuracy with the LRX. He was and is right! I really love the accuracy and terminal results of Berger VLD’s for whitetails, mule deer and antelope in my 257 Wby, 270 Winchester, 300 Wby and 300 win mag. It just seems my 6.5-300 Wby only likes the one factory load. Every animal I’ve shot with it dropped where it was hit. Dead is dead so I really shouldn’t fret that it doesn’t like my favorite bullet.