Going to try these new Matchkings out. First thing I noticed is they arent much longer than the 230 hybrid but they do appear pointier. Second thing is where my coal is 3.72 with a 230 Berger hybrid and these I had at 4.0 inches and were not touching the lands. I pulled them down to 3.72 and will go shoot them and see what happens then I will do the .1 jump each set until I find length. Then try h1000, Retumbo, AND RL33. My first set is starting load of 90gr Retumbo cci250 primer and Nosler brass out of a 300RUM plus p. Has anyone verified the .8 bc. If so I should be able to safely crank these out at 3200fps.