Today I got an avg. of 2728fps, 46.65es, 18.83sd over 23 rds with my beta. I back checked after a perfect hit at 700yds when shooter gave a mv at 2834. I used that mv perfectly back down at 600-200. so, 2834fps out a 26" Rock 1 in 8 twist M24. Even though the ES and SD are a little high for me the ammo performed well and I will buy more. DA was 6000ft, 100 deg F, 40% hum. Hope this helps you out.
Thanks for the feedback
Your setup is very similar to the rifle I've got on order. Hope I similar positive results. I'll have to get some more 260 on order.