Started when I bought my first .41Mag. Have you seen the cost of factory .41 ammo? Instead of spending $35/20rd of Winchester Silvertips (175gr at "published" 1250), I was loading 215gr at 1350fps for less than $8/50rd. Hmmm. Shoot 200+ rds in a range session for the cost of 20rds of factory? No-brainer, especially now that I have 4 of 'em to feed. Then I realized I could load .45ACP for cheap & started feeding my 1911 for short dollars.
Both my Ruger Bisley .41s really like a 240gr Keith & hoping the new Blackhawk & Henry like 'em as well, as I'm getting ready to up the ante & load those over a healthy pour of 2400.
All the scares & shortages convinced me to stock up on powder, primers & projectiles. I haven't started loading for them yet, but I have turrets & dies for .357, 9mm, 6.8SPC & .30-30. Still need .45-70 dies & possibly .300Blk, tho I still haven't decided whether I want to stay with the .300Blk or go .277Wlv.