First of all it’s safer than risking a high pressure load because of a few drops of rain when pushing for max velocity.

Second is the difference in speed between max and best accuracy is not why I may have lost a match as the difference in wind drift is negligible.

As for stable over a wide range of temperatures… well that’s easy to say, but hard to prove in any realistic time frame, so in principle I call this an almost impossible quest for perfection in an imperfect world.

But hey, if you have the time and place to test under a wide variety of conditions, by all means go for it… you can probably shoot off the porch.

Circling back to the most accurate load at moderate pressures… doing that requires the perfect barrel twist rate for that velocity range, so hopefully you have it.

I remember when I started shooting 6x47L with a 1:8.5 twist, I had to run a hot load, when a 1:8 would have allowed me to run a more polite load to get a good result without the pressure.

Option 2, whether a hotter .284 load – or a magnum that invariably upsets slightly more upon firing, can still yield very tight groups considering a 1 moa 10 ring, and a lot of shooters choose it. (While some guys swear there’s no absolute accuracy penalty to magnums, 100-300 yard records say by a little, there is, but it’s tiny compared to the 10 ring and probably accounts for no X-count loss at long range in still wind.). Brass and barrels are the only real penalty in matches like F class.

I think most of us refine point drops out of our rifle building and loads inside a few years, then it becomes wind calling. Obviously the arc of the slower TR bullets requires greater hold offs to hit center. The risk of greater holds being hitting where you aimed, further from the center, and great TR shooters agg’s indeed overlap the good open shooters.

The interesting thing is that magnum impacts gap open-standard by the same amount that standard gap TR, which is a ring’s value in common trying conditions. By the same reasoning, if you combined a magnum shooter and the top wind caller in the same person, that should yield the open winner. The speed/BC appeal is undeniable at long range, if you could shoot an open division gun against a field of only TR rifles, you’d be remiss not to, which is speaks directly to picking option 2.