Reply to beatgridding when the track is out of tempo

Hi everyone

Just wondering if anyone has any tips on how to beatmatch when the grid goes out of time.

So I've got some tunes from vinyl and they're almost a constant BPM and the grid looks good at the start of the track, but it drifts by the end of the track.

I'm using Traktor and an S2. Is the only way to beatmatch to switch off the synch button and nudge the track forwards or backwards with the outer rim of the jog wheel?

Cheers

Jibb