Hey all, this is my first attempt at using a chronograph for load development and finding an accuracy node. I am shooting a Winchester 70 FTW in 270 WSM using a 145 ELDx, currently using magpro powder. I didn't quite find the velocity that I was hoping for, but I do have data and I am not sure what to do with it. I loaded from 65.5gr to 69gr and found no signs of flattened primers or difficult bolt lift. I shot two ladders with the following velocities:
65.5= 2909,2908
66= 2949, 2917
66.5= 2992, 2986
67= 2973, 3027
67.5= 2995, 3075
68= 3029, 3070
68.5= 3040, 3073
69= 3064, 3141
This was my first time shooting off of a bench in a long time and I was pressed for time so I didn't take as much time as I should have shooting, but it is very apparent that I am out of practice with rifles. I will post up a picture of the group and throw myself at your mercy. It seems that there is the least amount of vertical dispersion between 67.5-68.5. Should I pursue this further, or should I look into other powders to get more velocity? I have H4831sc and RL19 in the cabinet to play with, but I consistency and accuracy are far more important to me than chasing velocity numbers. Deer are not going to realize a 100fps difference, and I honestly don't see myself shooting further than 500 yards at game anyways. I apologise for the book, and appreciate your information.
65.5= 2909,2908
66= 2949, 2917
66.5= 2992, 2986
67= 2973, 3027
67.5= 2995, 3075
68= 3029, 3070
68.5= 3040, 3073
69= 3064, 3141
This was my first time shooting off of a bench in a long time and I was pressed for time so I didn't take as much time as I should have shooting, but it is very apparent that I am out of practice with rifles. I will post up a picture of the group and throw myself at your mercy. It seems that there is the least amount of vertical dispersion between 67.5-68.5. Should I pursue this further, or should I look into other powders to get more velocity? I have H4831sc and RL19 in the cabinet to play with, but I consistency and accuracy are far more important to me than chasing velocity numbers. Deer are not going to realize a 100fps difference, and I honestly don't see myself shooting further than 500 yards at game anyways. I apologise for the book, and appreciate your information.