I like a horizontally mounted CMore Slide Ride in a Cheely mount, but unfortunately he doesn't Stock them so you have to get enough people to buy a dozen. The Quinn mount works but it puts the glass further forward.
In that case I would just mount the optic and skip the porting. I experimented with slow powders under light bullets from 80 PF to 170 and could barely discern any difference in muzzle flip.
I have a metric crapload of WAC ... is it a BIG difference worth trying to trading 'up' to HS-6 given its readily available right now? ... Or more like a 2-5% better difference (for 9mm 115/121/124 major), something I would barely notice as a B/A Open shooter? Assume minor hassle factor of swapping out powder isn't an issue :-)
Considering you're 0.03% closer to A than I am one SURE you'll feel the difference On second thought no improvements to your game, I'm in this race to win!
This isn't exactly true, if you compare book loads at the same velocity you'll see slower powders produce less pressure, it's gas volume which works the comp, not pressure. For an extreme example if you used enough Titegroup to make major it would be a very high pressure round (maybe even enough to blow up your gun), but would not work the comp as well as HS6.