Thread: 7x57 subsonic

Originally Posted by longshot

Just to try and get the thread back on the rails here, does anyone have any load data.

I would us any load data for a similar bullet weight in a 308 as a start point. Use a chrony. I found that the shotgun type powders give much lower ES than Trailboss which seems counter intuative for a powder that better fills the case. If you have TB load 10 gr and see what velocity you get. With subs I found that velocity and powder charge follows a close linear response - because we are not looking for a max load and pressure signs. I would load one at 10gr and then go up or down from there. If you get them at 950 - 975 they will be very quiet compared to 1050