Broad Reach,
I shoot indoors with my own cast 148 BUTTON-NOSE WADCUTTERS.
I CAST and COAT with HI-TEK coatings that I purchase from Donnie at Bayou.
I load them with BULLSEYE, 2.5 grains (25ft and 2800 loads per pound)
up to 3.1 grains and I crimp lightly in the first crimp groove, leaving a bit of the full diameter showing.
The GOLD STANDARD Bullseye load was 2.7/2.8 grains for a 148 HOLLOW BASE WADCUTTER.
You can start at 2.7 and work upwards, best load will probably be 3.0/3.1, the target will tell ya.
ALWAYS DUE THE PUSH TEST FOR POTENTIAL BULLET SET BACK!
THE NECK TENSION OF THE BRASS HOLDS THE PROJECTILE, NOT THE CRIMP!
Good Shooting.