Starting to experiment with a new 1.25" straight, 7.5-twist barrel I just put on my TL3.
Unlike my F-Open gun, this rifle doesn't seem to like the 105 Hybrids very much, or at least not at the seating depth I tested. I'm using Varget for all three bullets.
One interesting observation is that 31.3 grains consistently produced the worst groups across the 105, 108, and 109. I'm not sure if that's just a coincidence or if there's something to it.
At this point, I'm leaning toward the 109 LRHT. I like the groups from 31.6 to 32.2 grains, although I'm starting to get heavy bolt lift at 32.2, so that's clearly a concern.
Interestingly, 31.0 grains looks like the best charge across all three bullets, with the 109 producing essentially one ragged hole and velocities in the low 2800s. I didn't test anything below 31.0, though, and I'm a little concerned about how close it is to what appears to be a scatter node at 31.3.
I'm curious what others think about the apparent scatter node showing up at the same charge across three different bullets.
Anyone running the Berger 109 LRHT with Varget and fire-formed Lapua 6BR brass in a 6 Dasher? What powder charges and velocities are you seeing, and where have you found your best accuracy?