Thread: Large MV variation from trueing

Sounds like you are doing most things right and I agree that it is a large MV delta from a CAL MV exercise when one has used a CDM. There is the possibility that you are unlucky and have a barrel that significantly degrades the bullet's BC compared to others but lets work through a common fault checklist first:

1. Are you 100% confident that the distance you CAL MV'd at was correct?
2. Did you update your "environment" prior to conducting CAL MV?
3. How many rounds are you using to get your mean point of impact for your CAL MV?
4. What is your MV SD/ES from your LabRadar?
5. How many rounds does the new barrel have through it?

Feel free to flick me a PM, I can give yo my phone number and we can work through it over the phone.