I'll try this again on a new thread.Anyone tried loading the winchester 46 grain jhp's?Tried a few in a .223 and not pleased.All powders tried shot better at the low velocity end.Didn't really make an effort to get 'em shooting right.Maybe a reduced load at 22 hornet velocities?
I've done a fair amount of testing with the Win 46 grain .224 bulk bullets and different powder combo's. My results were very similar to yours, however. Many loads gave decent results, but not up the the potential of what the .223 has to offer. I did listed a few loads that showed very good results.
All loads listed are from either the Sierra, Speer or Hornady manuals for 45 grain bullets and are below maximum listed levels.
25.5 IMR 4895 CCI 400 - approx 3100 fps
26.5 Varget CCI 400 - approx 3100+ fps
21.7 IMR 4198 CCI 400 - Sierra shows this load at 3300 fps w/ 26" bbl; Hornady at 3200 w/24"; Speer at 3000+ w/22"
The OAL used is what is listed in the manuals.
Each of these loads print 1 1/4" - 1 1/2" three shot groups at 200 yards through an H&R Ultra rifle 24" bbl and a Weatherby Vanguard 24" bbl.