The difference in power of 1FPE will not affect accuracy. If you drop it another 1FPE it will still not make it any less accurate.
What it will do is make range estimation more important. If you are using some form of range finder (LRF or scope) then a loopy trajectory will not matter.
If however you are using MK1 eyeball then a loopy trajectory is certainly a handicap unless you are fairly remarkable at range estimation.