I tried these in the Meon competition on Sunday. Unfortunately I didn't have chance to set them up properly so went with a chair-gun generated turret tape which in practice didn't match the real world, i.e. I was at least 6 clicks down on my 55yd setting from theory.
The previous Sunday I had literally tried a dozen shots at 55yds and found them very accurate i.e. 4 shots all touching with two through the same hole. This was very promising, but without being able to verify the chair-gun settings was ultimately frustrating as I had a lot of high misses where I had adjusted to compensate for the unexpected drop at range.
Still, I'll set everything up properly and give them another decent go Sunday.