Barrel: rainer Arms mod2 18 inches 223 wyle
Had 240 rounds on it when I start the test.
Powder: 8208 xbr 23.0 to 24.0 dropped on a fx120
Primers:
Rem 7.5 first row
Fed 205MAR second row.
Seat depth: 2.260
Bullet: Sierra 77gr smk
Test shot at 200 yards, off a bench off sandbags.
Holds and generally felt much better over the gun when shooting the federal primers.
Next step is seating test at 2.260, 2.255, 2.250, and 2.245
I think there is a clear node at 23.2 and again coming in at 24.0. Oddly enough 23.6, a very popular load seems to be a scatter node with both primers.
I never would have thought I needed to load 24.2, as most show pressure before that. My brass looks good at 24.0. Lake City brass, annealed, sized, and mandrel.
Where do you think I should go? I am really wanting to load 23.9 if not 24.0 for velocity sake (2750) but somewhat concerned with a lot change with 8208xbr.
What does the hide say?
Had 240 rounds on it when I start the test.
Powder: 8208 xbr 23.0 to 24.0 dropped on a fx120
Primers:
Rem 7.5 first row
Fed 205MAR second row.
Seat depth: 2.260
Bullet: Sierra 77gr smk
Test shot at 200 yards, off a bench off sandbags.
Holds and generally felt much better over the gun when shooting the federal primers.
Next step is seating test at 2.260, 2.255, 2.250, and 2.245
I think there is a clear node at 23.2 and again coming in at 24.0. Oddly enough 23.6, a very popular load seems to be a scatter node with both primers.
I never would have thought I needed to load 24.2, as most show pressure before that. My brass looks good at 24.0. Lake City brass, annealed, sized, and mandrel.
Where do you think I should go? I am really wanting to load 23.9 if not 24.0 for velocity sake (2750) but somewhat concerned with a lot change with 8208xbr.
What does the hide say?
