in theTRG42 338LM with the 300 Scenar and 93 grs Retumbo loaded to mag length is about .050 jump and they are extremely accurate at just over 2700 fps,,
I shoot the 123s in 6.5x47 with 38.5 grs RL15 and or Varget and they shoot about the same from .020 jammed to .020 jumped,,I load them .015 jumped and they really shoot good,,