Thread: FINALLY got my LR come ups

Originally Posted by Dead is better

I tested the shit out of the software, tinkering with everything. BUT this time i had the knowledge that my 6.5x55 T3, using 140g Amax was truely doing 2723ft/sec average. I had the good luck of being able to use a very expensive chrony set up by 2 gunsmiths, in absolutely perfect weather! They measured my case head expansion and found my load to be extremely mild with next to no expansion after 5 firings. I'm lucky to know these fellas eh. They suffer me with the patience of saints

So, with confidence I believe I'm using G7 (on their advice) which comes with a default bc of .299. The G1 bc is 0.584 (litz) and this was pretty close to my field tests too. G7 was only marginally better and apparently it really helps the .338 guys out at the 1.5km mark. My rounds go crap-sonic at 1100m so 1025 would be about my max accurate distance.

Did you try the truing function in litz' app? Most people suggest not even bothering with a chrony and just getting click values required at various ranges and putting the data into Ballistic AE. You can then "true" the ballistics chart it generates.

It does this by adjusting the muzzle velocity to the closest possible fit to what's actually happening in the real world (the data you entered).

Two different chronys we're giving me readings around 2700. Went out for a day with a friend and we shot 200m, 400m and 600m and entered the data. It generated a velocity of 2661fps to give me the closest fit to what was actually happening.

I need to do this click test mentioned earlier on my scope!