Straight 284 with H4350 charge weight?

[Keith Glasscock]

Any idea why at 50.5 I'm at 2868 fps?? H4350 and 180 hybrids

I recently came into possession of a tight bore barrel. It makes a lot of velocity at lower than normal charges. Nowhere near your numbers, but it makes about 75fps more than it "should".

 

[savageshooter86]

32". 9 twist. 49.6gr just gave me 2824 fps using Labradar

 

[KenOath]

I'm getting 2770 at sea level with 50.4gn of H4350, after 200rnds on Bartlein 30" tube, bullet seated at the lands..need to do seating depth testing next.
My best node for elevation is between 50 and 50.6gns, i shot a .220" group with 51.6gns but had elevation either side of that charge. 2770 is a bit on the slow side but it may speed up a little yet?, at least with this lower node I will get a little more brass life hopefully? All testing done at 200m with 180vld targets.

Cheers Rushty