If the magneto timing has changed due to points wear, then the magnet timing is no longer matched to the points timing. This will cause a weak spark condition.
This condition occurred on my impulse coupled mag, so the engine was very hard to start, although it ran OK once I got it running.
I sent my mag in for service, it was very old. I think the points condenser was bad, causing the points to run hot, which overheated the rubbing block allowing the points gap to decrease. When I looked back thru the engine log, this mag had a history of points resetting, and indeed, the points adjustment was maxed out.
when I upgraded the mag to a Pmag, I also lost some radio problems. So my mag might have been broadcasting a lot of electromagnetic interference?
My point is that you get about one timing correction without problem, but if you need to do more than 6 degrees (?), then your mag's E gap timing might be too far off and you will get a weak spark. This indicates an internal mag problem, which should be looked into.
Check your engine log, see how many hours are on the mag since it's last servicing, and look for any entries that indicate the mag timing has been reset and or the points reset. A history of mag adjustments that do not resolve on going timing drift would be a sign that the mag needs some work.