yeesh, what a waste of time and money that's all better spent on doing it proper with a smoothbore.
I have had outstanding results making homemade shot cups in slow twist barrel. out to 20 -25 yards. For a 50 cal I use a tube from dry cleaners hanger or 7/16th dowel as Cartridge former. 1 1/2" x 3" of light cardboard such as File Folder or waxed cardboard from box of Frozen Vegetables is about right. Wrap around former tape closed w/ scotch Tape plug bottom w/ glued in card board or cotton. I use 45 G of fff G & 45- 50 G of # 7 1/2 bird shot. 1 over powder card, stack of 4 or 5 discs of corragated cardboard for wad, then shot cup w/ shot & 1 over shot card ( cereal box cardboard) can cut petals in shot cup if desired. Sounds complicated but isn't, just make up in small batches & will have them when you want them. Dave Canterbury has a video showing birdshot in rifle without the shot cup. shot never touches bore when using shot cup, pick one up down range & you will see how well they work : ) I am very fortunate to be able to experiment in my back yard.
It was a recognised method of shooting small game whilst on a campaign by substituting a wad and Bird shot for the Bullet.I have broken Clays with a rifled weapon many times.
BP | Bronze Point | IMR | Improved Military Rifle | PTD | Pointed |
BR | Bench Rest | M | Magnum | RN | Round Nose |
BT | Boat Tail | PL | Power-Lokt | SP | Soft Point |
C | Compressed Charge | PR | Primer | SPCL | Soft Point "Core-Lokt" |
HP | Hollow Point | PSPCL | Pointed Soft Point "Core Lokt" | C.O.L. | Cartridge Overall Length |
PSP | Pointed Soft Point | Spz | Spitzer Point | SBT | Spitzer Boat Tail |
LRN | Lead Round Nose | LWC | Lead Wad Cutter | LSWC | Lead Semi Wad Cutter |
GC | Gas Check |