Not really.
Ok.
I thought because you had the birth and death years that you had found these records. I took a look and had found Magnus' and Britta's death records.
The Magnus death record you found is the one I had found and believe it to be him, also here is Britta's (I think) death:
Tranemo C:7 (1787-1805) Bild 153 / sid 148 - last on left page.
Magnus died of "bröstsjuka" - some kind of lung disease (not specified). Died 12 May 1765.
Britta died of "ålderdoms svaghet" - old age. She was 73 years and 11 months old and buried 19 Aug 1804.
Ian