.25 JSB KING HEAVY 33.94GRAINS !!!!

I have shot them from around 870-920fps and they were very accurate regardless of speed in the above range.

I'm shooting them at only 810 fps and they're more accurate than the 25.4 grn kings at 905 fps.

My gun is shooting them at 818 FPS average and very accurate. I went to Puerto Rico for Andys iguana hunt invite and tried them in the field. They hit like a hammer on those reptiles. Visit the pics in hunting post. I will keep testing them on my hunts and watching how they work in you guys posts. Very happy so far.
PS: Shooting MKII's

Low 880's same barrel shoots the 25.39's at 1000 fps surprisingly good but not as accurate as the heavies.

OMG! I TOTALLY forgot I have a sleeve of these pellets in the garage....BRB!

I have similar results as FastEddie above through the Wildcat. My Marauder didnt like the Heavy as much even with when velocities were over 900fps.