So far I haven't seen a delta so high, people report a few % difference, and we are going to improve that, right now we are trying a pure conservative approach to make sure it's completely solid. But it shouldn't be that bad right now. Could you DM me on Discord? Thanks!
To update other people having similar issues. I had a chat with VegetableVampire and I suspect this is a congestion issue from a less than ideal connection to the server and not an issue with our backwards reconciliation implementation. The main thing I want to focus on right now is that he has good aim with pncr but poor aim with shaft. Shaft is a lot of packages very fast so if the connection is not great and our transport has some issues that's gonna cause some congestion and momentarily increase your latency. With the latency changing so rapidly the backwards reconciliation algorithm starts failing.
We have a tentative fix for this and it's being tested. For anybody having a especially bad experience with LG compared to other weapons, I'll update when we think we have a fix.
UPDATE: Got good feedback on the fix so going ahead and pushing this as v294.