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Old October 05, 2019, 22:44   #1
Bwana John
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Success!!! 45acp Shotshell Loads (M15 cartridge)

Starting with 308 Win brass
Cut and trim brass to 1.18"
Anneal front 1/3 of brass
Resize and deprime brass with 45acp die
Start shoulder forming with 41 mag seating die and lube
Complete shoulder forming with 41 mag carbide sizing die and lube, use barrel's chamber as headspace gauge
Prime brass with Large Pistol primer
Punch out one cardboard 10mm wad, one bleach bottle 10mm wad, and one 9mm bleach bottle overshot wad
Charge with 6 gr W231
Seat 10mm cardboard wad over powder
Seat 10mm plastic wad over cardboard wad, seat wads over powder well
Add ~110gr #8 shot to right below case rim
Place 9mm overshot plastic wad over shot
Crimp overshot wad in with mouth of 38 spl seating die, finish crimp with 45acp round nose bullet seating plug in 45acp seating die

Put 14 lb recoil spring in full size Model 1911

Rounds feed, fire, extract, eject, and reload through full 7 shot magazine, slide stays open when magazine empty. Brass ejects ~ 8ft @ 4:30

Pattern at 15' is less than one foot in diameter

20% brass loss to dial in brass forming methods
5% brass loss after dialing in methods

I am considering nail polish over the overshot wad to waterproof and to make loaded cartridge able to withstand rough handling
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Last edited by Bwana John; October 06, 2019 at 20:50.
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Old October 06, 2019, 14:12   #2
Bawana jim
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https://www.grafs.com/retail/catalog...cp+shot+shells


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Old October 06, 2019, 14:41   #3
Bawana jim
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Here is some more fun with 45acp shot shells in a Tommygun.


https://youtu.be/ud3Csq6568k
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Old October 06, 2019, 17:40   #4
okiefarmer
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Quote:
Originally Posted by Bwana John View Post
Prime brass with Small Pistol primer
Won't those fall out? All of my .308 brass take large rifle primers.
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Old October 06, 2019, 20:49   #5
Bwana John
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Quote:
Originally Posted by okiefarmer View Post
Won't those fall out? All of my .308 brass take large rifle primers.
Large pistol primers, not small, my mistake.

Slightly shorter but still work fine
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