Sorry for late reply.
I think the problem is that in Factory mode the rifle will automatic get the right speed if the requested speed and the measured speed on the integrated chronograph is within +/- 100 fps. With your entered request 800 fps and the result measured 600ish the factory mode will not try to correct the speed.
I don.t know the reason to why this was working before but not now.
View attachment 464853 As you can see from the second bottom line above it needs to be within 100fps + or - to start to compensate the speed.
You can try this:
Set it to 600 fps and let it shoot to it reaches 600 fps.
If ok - Your have to have shot at least 4 consecutive shots where it stays within +/-4 fps before the rifle stores the result.
Then increase the speed to 650 fps and let it shoot until it reach the speed (if it does reach the speed)
Then increase up to 700 fps and shoot again see if it climbs to 700 fps. and so on all the way up to 800 fps.
The factory table below is the data the rifle uses to calculate settings for individual speeds - It will look something like this -
This factory table is my custom settings I added for my Deltawolf .177 / 23" barrel custom named KO13.43. The 1,2,3 and so is table row no.
Row no. 2, 4, 6, 7, 8 are marked with the "target" symbol this indicates that this is settings that the rifle calculated by interpolation. Example speed row 2 is calculated with the settings from row with 970 fps and the row with 960 fps. The rifle added row 2 after it shot 4 consecutive shots within +/- 4 fps.
Note in this I cannot select speeds faster than 970 and slower than 700 since my evaluation was that this would be around the speed I needed for this type slugs.
I do not know what went wrong in your case but your factory table could be corrupted somehow....
The 15.89 gr. and the 13,42 gr. was the only factory tables from the factory :-(
If i look at the values for one of the tables there is a bug Voltage increases at the low speed and up but at the third last lines, Pulse and Volt are equal to the above row with a higher speed..... But I did only use these factory mode the first day that i had the rifle.
I hope this can help you get the rifle back to "life"
Greetings from Denmark
View attachment 464859