Winchester PDX1 Defender .410 2-1/2" shotgun ammo has been a tough nut to crack in GURPS terms.
It's not quite buck-and-ball (High Tech p. 173) because it's got those three discs.
Then it hit me! The disc is a triplex round!
So generate the buck and ball normally with the BB size shot. Then calculate the triplex from the reduced ranges of the ball and you're done!
The "slug" is now a Rcl 1 x3 shot and the buck is a Rcl 1 x12. So it's x15, or 3x15 when fired from something silly like a Taurus Judge or S&W Governor.
Resolve as written... The larger projectiles are handled first, then the smaller.
It's not quite buck-and-ball (High Tech p. 173) because it's got those three discs.
Then it hit me! The disc is a triplex round!
So generate the buck and ball normally with the BB size shot. Then calculate the triplex from the reduced ranges of the ball and you're done!
The "slug" is now a Rcl 1 x3 shot and the buck is a Rcl 1 x12. So it's x15, or 3x15 when fired from something silly like a Taurus Judge or S&W Governor.
Resolve as written... The larger projectiles are handled first, then the smaller.