don't work so well at higher fps and I noticed in my rifle that shoots them @ 830fps they are good but not great. I've read the JSB .22 Ca 18.1 Gr Match Diabolo Exact Jumbo Heavy pellets work better at higher fps. I haven't tried them but I know someone that shoots them at 998fps and he can get one hole shots at 30 yards and dime size grouping at 50 yards. You might also give the Predator Big Boy Seniors a try, they're 28.5 grains - I shoot those out of my gun and they are great but I'm only in the 820fps range with them. I think they changed the name though and now they are called New Boy Seniors and from Skenco.
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