260AI/123SMKs

[Bolo]

Anyone have load data? 26 in. Kreiger 1 in 8.5. Want to use H4350[Got a bunch of it] Shooting tactical and maybe some 600 FClass.

 

[techshooter]

I get 3080 FPS from a 26" Pac-Nor 3 groove 1 in 9", using fireformed Remington cases, with 47.0 grains H4350 and the Lapua 123's with moly, seated 0.010" back from jammed in. Better than 0.5MOA at 600 yards.

 

[Bolo]

The throat was set up for 140Amax to jump .015 at mag length. Tried some 123 Scenars before and didn't get that good of a group with a lighter load. Maybe I'll try them again starting with 46gr and working up?

 

[techshooter]

Work up carefully, and you should find the node at about 3050 FPS +-, depends on your barrel. The 123 Scenars are a bit smaller in diameter than the US made bullets in 6.5mm, and shoot better in some barrels than others. I have not yet tried the new Sierra MKs in that weight, but would like to soon. FYI, I needed only 8.75 MOA come-up from a 200 yard zero to get to 600 yards. This is a bit better than the predictions at about 9.5 MOA.