I am also a big Hornday GP conical fan.
As for these bore size Parker's...
If the bore size conical's even somewhat group, they should be like throwing an anvil down range at 1400+fps. [:-]= Very lethal indeed.
I will order some to try for some groups and if they print, I'll toss one at a deer this fall (or perhaps mabey an engine block

). They look really good.
At least now I know who makes Traditions projectiles. I have some of the jacketed/sabotHydra-Con in 275gr flavor. Three packages that a friend gave me when he could not get them to group. I have yet to mess with them though.
Tahquamenon