A .40 is, or can be a very flat shooting caliber.
I’ve never seen one shoot at distance very well at low charges.
At 65g of fffg, they are like a laser beam.
Mostly dependent on rifling twist. Slower twist requires more powder.
Got back out today and did some more testing based on this thread. It likes a 60g charge of 3f to get my group to 50 yard zero. Way more than I would have guessed ony own but it worked.
I also have to amend my initial problem. I initially reported a 10-inch drop between 25 and 50 yards with a 40g charge. I have no idea what's wrong with me, but that should have read a 5-inch drop from 25 to 50. How I doubled that in my head is beyond me.
