I'm working up some loads for 9mm 124gr Hornady XTP's and have a few questions.
Both my Hornady and Lyman load books list 5.7gr of Power Pistol as max load. I've seen several postings much higher, and the Aliant website list max as 6.4gr.
Hornady load is specifically for XTP bullets
Lyman is for 124gr JHP
Aliant is for 124gr Speer Gold Dot JHP
I've read that the Speer bullets are plated, not jacketed, does that make a difference?
They all also list different OAL, Hornady being the shortest at 1.06
I would assume that the Hornady OAL is correct since it is for the XTP bullet, however I'm a little worried about loading as much as 6.2gr behind that load as I assume the pressure would be higher than say 1.1 OAL.
So far I've tried 5.7gr at 1.065 OAL, they shot fine and I got an avg of 1068 fps
Also tried 6.1 gr at 1.1 OAL with avg 1102 fps.
Both of these are below the listed book velocities but I fired from a longer barrel. Do chronographs vary much?
Both my Hornady and Lyman load books list 5.7gr of Power Pistol as max load. I've seen several postings much higher, and the Aliant website list max as 6.4gr.
Hornady load is specifically for XTP bullets
Lyman is for 124gr JHP
Aliant is for 124gr Speer Gold Dot JHP
I've read that the Speer bullets are plated, not jacketed, does that make a difference?
They all also list different OAL, Hornady being the shortest at 1.06
I would assume that the Hornady OAL is correct since it is for the XTP bullet, however I'm a little worried about loading as much as 6.2gr behind that load as I assume the pressure would be higher than say 1.1 OAL.
So far I've tried 5.7gr at 1.065 OAL, they shot fine and I got an avg of 1068 fps
Also tried 6.1 gr at 1.1 OAL with avg 1102 fps.
Both of these are below the listed book velocities but I fired from a longer barrel. Do chronographs vary much?