It all depends on expectations and needs. I don't load bulk ammo. Don't have the time. I'm also not a good enough handgun shot, nor shoot the style, where a 2% difference in powder charge will likely show in end results. I load for precision and consistency. The more variables that I can remove...
No. Follow the data.
Ocw. Ladder. Pick your poison. I prefer ocw. But, with both, the goal is to hit a velocity node where different charge weights run about the same velocity. That also equates to consistency in changing temps, which is the ultimate goal. Follow the data for charge weight...
That's really slow. You should be minimum 2750. Can probably get to over 2800, but do your workup. Those are load book numbers. Very neutered. Factory Hornady 140 eldm ammo tends to run over 2700, if not 2750.
You aren't getting any of the benefits or anywhere near the BC of that round as slow...
OCW. .3 increments.
Magnetospeed
100% pay attention to the data, not the group.
Load to the middle of a node.
Then seating depth in .02 increments. I start 4 tho off. I don't care to load for jamb if I don't have to, and with the bullet designs I run, generally find somewhere around 10 to...
Well, considering that we don't know what cartridge this is for, no one can provide a powder rec. The rec that was provided was single base, ie, temp stable, and then do your standard load work-up. That's about as precise as any rec can go with the info provided. And would go for any cartridge.
There are potential pitfalls of all measures. Having an accurate check scale that I use in conjunction with my primary scale and thrower serves as my backup.