Originally Posted by trebark
Nice rig and nice shooting. See that your load used H4831. Try H4350, you will realize much better velocities.
My 260 by MCR
The load shown above averages 2839.
Today, 42.5gr H4350 gave me 2898, but there was some vertical stringing that I can't account for. Think I'll try seating depth adjustment. If I can get that veritcal out, this will be an awesome load.
Edited to add that the necked up Lapua .243 brass definitely formed the doughnut on the very first firing. I can easily slide a bullet into a fired case until just short of the neck/shoulder junction, where the bullet comes to a definite stop. For now, I will use my Remington .260 brass, but may try Lapua .260 brass. Hesitant to do so because so many have said they have to turn the necks with the new Lapua .260 brass. That is something I wish to avoid.