77gr Sierra Tipped MKs

[freedom]

Anyone have any load data specific to the polymer tipped match kings? The B.C. is .420 at velocities greater than 2400fps. The regular MK BC is only .360 in comparison. I'm having trouble finding data that's not the normal bullet.

All I have powder-wise right now is Varget and benchmark.

 

[SOLGardener]

Why not drop 10% and work up? BC doesn't have anything to do with internal ballistics. It's the exterior ballistic aspect like sectional density.

Or call Sierra and ask them a starting point.

 

[1006]

Looking at the Hodgdon web sight, I would start with 21 grains of either powder and work up. Plan on a max around 23.

21, 21.5, 22, 22.3, 22.5, 22.7, 22.9, 23, 23.1 ....

If it is going in an AR mag, the tip might make them too long if they are not seated deeper than recommended, and then the load must be further reduced.