Any fix for a locked groove?

What kind of TT and TA do you have?

If I leave my dustcover on, I get a "locked groove" every time (when my tonearm bumps into it).

If my tone-arm SME V is sufficiently low set-up for VTA, some slightly warped records touch the arm close to the thick end of the arm tube when the needle is in the last 1/3 - 1/4 of the LP. This lifts the arm out of the groove with every turn and again = "locked groove".
Solution: use a higher (taller cart to go up with the arm for same VTA, use cart with more positive VTA requirement, clamp the record a bit harder to flatten it some more, if it can be done, don't play warped record, use tone arm with thinner arm tube, etc.)
Greetings,

Hey Guinness,amazingly enough one of the transfered LPs was Armageddon (the german band)!
I have RB 600/Grado The Reference/Michell Gyro SE setup.

Axelwahl, SME makes a 'headshell spacer' to solve the problem you're having. I use one with my Transfiguation cartridge -- most modern MC cartridges are rather short (heightwise) and the back of the armtube invariably will hit the edge of the record when the arm gets near the end of play.

overhang, The Rega RB600 shouldn't suffer from the SME's problem (fat armtube ;-) however you might want to check out the lift mechanism to make sure that:
a. It's falling away completely when in the down position, and
b. the curved lift pad is perfectly horizontal and isn't bent up a bit, allowing it to make contact with the bottom of the armtube near the end of play.