Denny2277, and Retiredcpo,
One thing I nearly always recommend is Win LR primers. They are not The EndALL DO-ALL but they work in a very wide variety of situations very well. They are very consistent primers, and they are hotter than most regular LR primers without being As hot as most Mag LR primers. For ball powders, slow burning powders, and under harsh winter circumstances the Win LR primer will usually do a very consistent job. If you think about it, What kind of Powders does Winchester / Olin use? Ball.
Why do you suppose they designed their primers to be a little hotter than average...? Win LR and Wolf LR are my two go-to primers these days. For different reasons of course.
By the way, I am not your average keyboard commando, my mentor was an Army Green sniper in Viet Nam. I consider myself to be extremely lucky to have had such a mentor for the last 20+ years. Mark taught me all phases of reloading and many of the various ins and outs of shooting. To this day he is still hands down the better shot, but I am not an average shot any more thanks to him. I am a shooting enthusiast who enjoys helping others when I can. Just a general FYI is all.
Have a good one,
P.S. By the way, RL15 and Win LR primers with the 168 you listed should be a good loading combo. Unless you have something strange going on with your chamber or your bore you should find it near to impossible to get into an Excessive Pressure Situation as it should reach maximum SAMMI right about the time RL15 and that 168gr bullet go compressed.
P.P.S. I am watching with avid interest your guys results with CFE by the way, Thank you!