At our range we have a pcc group and are in search of the perfect ammo, as we all are...
We settled a bit on 115's plated (or FMJ same result) with slow powders (N350, N340).
IPSC rules however state a minimum bullet weight of 115gn...
Measuring all brands available in Europe they are most of the time a bit out of spec. Officially at a L3 match you can be disqualified if yr bullet doesn't meet 115 gn.
So we went to 123 gn and 124 gn bullets plated and fmj's. Somehow plated bullets are always a bit faster (they expand in the barrel??)..
Powder changed into faster ones (N320 / RS12 style). Basically where the slower powder gives more push the faster powders feel snappier.
Sight recovery is in essence the same, if rifle gripped real hard maybe the faster powder / heavier bullet combo has slightly faster sight recovery.
As for accuracy up to 50 yards no real differences between 115's and 124's.
Just liked to share this experience since we are stuck to our houses in Europe, all ranges are closed (like all shops) so everyone is bored to hell...
Stay healthy!