Due to a bad experience in the past I want to make sure I'm on the right track and not chasing a load that doesn't exist.
Tikka T3x Varmint chambered in .223 1:8 twist heavy barrel.
Varget, Lapua brass, and Berger 75 grn VLDs seated .05 off the lands. BTO 1.765 +/- .001.
I worked up a load until pressure signs(blown primers) at 24.3.
So far I have the following groups
23- 1.3
23.3- 0.8
23.6- 1
23.9- 1.1, 1.5, 1.9
24- 0.6, 0.8, 0.9
24.1- 1.4, 1.6
24.3- 0.9
Can 0.1 grn really make that much of a difference?The charges I focused on seem to show that, although it's not a huge amount of data. That's roughly 4% so I'm guessing so but I want to make sure. Should I mess with seating depth at 24 grn to see if I can tighten up that load a bit, or are these variances likely just coincidence from some other factor? What would you accept as a good load given the rifle? I was hoping for consistency 0.5. Should I try some other bullets?
Velocities at 24 grn are 2650-2705. I expected it to be higher near max pressure signs, but my chrono is a piece of shit that shows big ES like that with match grade factory ammo as well so who knows...
What next? Thanks.
Tikka T3x Varmint chambered in .223 1:8 twist heavy barrel.
Varget, Lapua brass, and Berger 75 grn VLDs seated .05 off the lands. BTO 1.765 +/- .001.
I worked up a load until pressure signs(blown primers) at 24.3.
So far I have the following groups
23- 1.3
23.3- 0.8
23.6- 1
23.9- 1.1, 1.5, 1.9
24- 0.6, 0.8, 0.9
24.1- 1.4, 1.6
24.3- 0.9
Can 0.1 grn really make that much of a difference?The charges I focused on seem to show that, although it's not a huge amount of data. That's roughly 4% so I'm guessing so but I want to make sure. Should I mess with seating depth at 24 grn to see if I can tighten up that load a bit, or are these variances likely just coincidence from some other factor? What would you accept as a good load given the rifle? I was hoping for consistency 0.5. Should I try some other bullets?
Velocities at 24 grn are 2650-2705. I expected it to be higher near max pressure signs, but my chrono is a piece of shit that shows big ES like that with match grade factory ammo as well so who knows...
What next? Thanks.
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