It's not just me then. Well, the best group could be covered up with a dime and measured 0.162. One big ragged hole and 3 other 3 shot groups under 0.70 so it likes this powder and bullet.
Update: Went to range today to fine tune my initial 12 shot ladder test with Vit N560. I think I have found the one my Tikka likes. Average velocity was 3304 with no pressure signs. This will be by deer load for this fall.
Love my 270 WSM. Worked up a good load with 150g Hornady InterBonds for cow elk and thought I should try for a good 140G thin skinned load. Used Vit N560 and did a 12 shot ladder test and the whole group size was 1.326 with an average velocity of 3215fps. Next step is a few 3 shot groups to...
Finally got back to the range today with the 150G Interbonds. I worked on some 3 shot groups based on ladder test with Hunter and IMR 4831. I think I have a winner with this load of IMR 4831. Velocity was 3034 with no pressure signs. It was 50 degrees and a light breeze. I will play with...
Joe,
With IMR 4831, I started with 60G and ending around 63. That was around 62,400 PSI. I wanted to stay a fair amount under SAMMI of 65000PSI. I maybe could have pushed it harder but I got the velocities I was looking for and so far, the accuracy looks very promising.
Went to the range today and did 2 ladder test with a combination of GRT and Quickload for my Tikka 270 WSM and Hornady 150 G InterBonds. Very happy with the initial results and velocities. On the Hunter, shots 8,9,10 were really close with those 3 average velocity of 3036. Next up with IMR...