I was working on a .177 HW98 and the owner sent me a few different brands of pellets to test and the Sniper Mediums were very accurate, however rather odd in appearance...
Here are a few groups shot sitting on a bucket resting the gun on cross sticks (US hunter class field target style) comparing the different pellets supplied.......
I then tried some H&N Sniper Lights and they flew into "patterns" instead of groups at 30 yards (no target scan). I also found that the base of the Sniper Medium and Sniper Light was different with a "L" mounted into the Sniper Light base. Could the off center "foot of the L" be creating an imbalance?? .......
I was thinking of trying the .177 H&N Sniper Mediums from my tighter leade .177 HW95, however some shooters on this side of the "big pond" are claiming inconsistencies from "lot to lot".
Concerning the H&N FTT, I shot some from my .177 Beeman R9 and had quite a few "unexplained fliers" so I measured the heads of pellets from tins of supposedly 4.52mm pellets (0.1779in).
Shooting the FTTs I was noticing an extreme variation of fit in the leade of my .177 Beeman R9 so I'm thinking the combination of the "loose leade" in the R9 bore (relative to the newer .177 HW95 bought later) and large number of undersize FTT heads is the cause. I sold the balance of the FTTs I had before buying the HW95 which has a tighter .177 leade.
Anywhoo......I do like the cleanliness and pre-lubing of the Sniper Mediums I bought, however too many UNEXPLAINED fliers from the .177 R9.