Steve2md
Member
want a fun and "showy" round.....fill the case to the brim with Black Powder and compress with your projo. Smoke, Fire, Boom, Fun all around! (Just don't forget to windex your gun after shooting to deactivate the salts in BP...
Glock 20 fun. Nuclear 9mm plinking
- Thread starter atblis
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atblis
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CAUTION: The following post includes loading data beyond currently published maximums for this cartridge. USE AT YOUR OWN RISK. Neither the writer, The High Road, nor the staff of THR assume any liability for any damage or injury resulting from use of this information.
This all from a Glock 20 with standard length Lone Wolf 357 SIG conversion barrel. OAL was 1.26" Cases were RP 40 S&W cases run through a 40 S&W Lee carbide die, then a Lee 357 SIG sizing die, and then a Lyman M expander die. Tula small pistol primers. Precision delta 115 gr 9mm FMJ bullets. AA #9 Powder.
Powder (gr), Velocity ft/s
12.0 gr 1056 1100
12.3 gr 1142
12.6 gr 1097 1058 1228
12.9 gr 1240 1173
13.2 gr 1140 1249
13.5 gr 1305 1157 1243
13.8 gr 1288
14.1 gr 1062 1234 1300
14.4 gr 1291 1268
14.7 gr 1458 1373 1375
15.0 gr 1403 1450 1402
15.3 gr 1494 1484 1501
15.6 gr 1503 1518 1460
15.9 gr 1543 1546 1550 1550
Some rounds had huge muzzle flashes but light recoil especially for the lower powder charges. Velocities were also erratic. The higher powder chargers had no noticeable muzzle flash, and the velocities also became much more consistant.
There's room for a little more powder, but I still have no clue what the pressures actually are. All of the case heads are expanded about the same. None of them are expanded past 0.425", but I don't think this actually is indicative of pressure as the barrel appears to support the brass well.
This all from a Glock 20 with standard length Lone Wolf 357 SIG conversion barrel. OAL was 1.26" Cases were RP 40 S&W cases run through a 40 S&W Lee carbide die, then a Lee 357 SIG sizing die, and then a Lyman M expander die. Tula small pistol primers. Precision delta 115 gr 9mm FMJ bullets. AA #9 Powder.
Powder (gr), Velocity ft/s
12.0 gr 1056 1100
12.3 gr 1142
12.6 gr 1097 1058 1228
12.9 gr 1240 1173
13.2 gr 1140 1249
13.5 gr 1305 1157 1243
13.8 gr 1288
14.1 gr 1062 1234 1300
14.4 gr 1291 1268
14.7 gr 1458 1373 1375
15.0 gr 1403 1450 1402
15.3 gr 1494 1484 1501
15.6 gr 1503 1518 1460
15.9 gr 1543 1546 1550 1550
Some rounds had huge muzzle flashes but light recoil especially for the lower powder charges. Velocities were also erratic. The higher powder chargers had no noticeable muzzle flash, and the velocities also became much more consistant.
There's room for a little more powder, but I still have no clue what the pressures actually are. All of the case heads are expanded about the same. None of them are expanded past 0.425", but I don't think this actually is indicative of pressure as the barrel appears to support the brass well.
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