Ive just switched from 7.87s to 8.4s after shooting them for nearly 2 years in HFT. As i got more experienced I was finding I was dropping a few points due to less predictable flight path over 40yds in switching wind. !st comp using 8.4s gave me my highest score yet in a national round.
Out of 4 different batch numbers of 7.87s I only found 1 that my barrel liked, the other 3 sprayed a much larger group at distance even in still conditions.
If you can't fix it with a big hammer, your hammer aint big enough....
Air Arms S200 Tench Reg, Tilly's Custom Stock, MTC 3-12x24