For those interested, 20 clicks upwards from a “normal” 100M zero on a scope with 1/4” increments will get you on paper. and there’s not much info out there - frustrating. Meawls wrote:I’ve just lately started dabbling in this area. by all accounts these tend to result in less velocity deviation. I also plan to substitute the BR primers for magnums once I’ve found a load that sits just below the barrier. I’ll get back to you on these when I get opportunity to test. not to mention point of inability to stabilise in THAT barrel. I’ve loaded up identical loads for each rifle using 62gn Nosler Varmaggedons, and these should be much closer to the sound barrier.

I was unsure whether these loads would stabilise in the 1:12 barrel. ?! Wouldn’t need to expand at all for easy day-long headshots. by boy-ohhh-boy were they fun to fire, especially in that massive VSSF! And how about exactly 1/2” at 100M. Each of these loads easily exceed the speed of sound. several ballistic calculators will calculate this for you after the parameters are entered. I regard speed of sound at around 1080, but it’s variable dependant upon conditions. All were groups of 3 fired at 100 metres. didn’t want to go much lower because it would leave quite an airspace in the cases, which by all accounts leads to increased deviation in velocities, which by all accounts leads to less accuracy. All loads with Federal match primers,and 5gns trailboss. I’ve just lately started dabbling in this area.

Subsonic 223 varmint ammo