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Old 05-26-2009, 16:41   #37
Bringsteen
10mm Shooter
 
Join Date: Dec 2007
Posts: 101
More Data

Just placing this in the sticky.

Here are some more data for Hodgdon Lil'Gun in the 10mm. For this set of tests, my protocol was essentially the same: new Starline brass, CCI 350 magnum primers, hand weigh each charge, et cetera. I tested some slightly different powder charges and used both standard and heavy crimps. I also fired a string through my Smith & Wesson 610. Some of the strings do not include 10 shots because I got some sunlight-related error readings.

Hodgdon Lil'Gun, 17 grains, Standard Crimp
1) 1427.0
2) 1371.0
3) 1345.0
4) 1348.0
5) 1360.0
6) 1358.0
7) 1347.0
8) 1369.0

High: 1427.0
Low: 1345.0
E.S.: 82.0
Ave.: 1365.6
S.D.: 26.7
95%: 23.9

Hodgdon Lil'Gun, 17 grains, Heavy Crimp
1) 1355.0
2) 1366.0
3) 1325.0
4) 1320.0
5) 1355.0
6) 1347.0
7) 1361.0
8) 1348.0
9) 1341.0
10) 1308.0

High: 1366.0
Low: 1308.0
E.S.: 58.0
Ave.: 1342.6
S.D.: 19.0
95%: 14.3

Hodgdon Lil'Gun, 16.8 grains, Standard Crimp
1) 1397.0
2) 1362.0
3) 1357.0
4) 1364.0
5) 1383.0
6) 1341.0
7) 1351.0
8) 1342.0

High: 1397.0
Low: 1341.0
E.S.: 56.0
Ave.: 1362.13
S.D.: 19.48

Hodgdon Lil'Gun, 16.8 grains, Heavy Crimp
1) 1358.0
2) 1314.0
3) 1350.0
4) 1327.0
5) 1320.0
6) 1333.0
7) 1315.0
8) 1366.0
9) 1316.0
10) 1323.0

High: 1366.0
Low: 1314.0
E.S.: 52.0
Ave.: 1332.2
S.D.: 19.1
95%: 14.4

Hodgdon Lil'Gun, 17 grains, Heavy Crimp, Smith & Wesson 610
1) 1448.0
2) 1432.0
3) 1518.0
4) 1418.0
5) 1363.0
6) 1421.0

High: 1518.0
Low: 1363.0
E.S.: 155.0
Ave.: 1433.33
S.D.: 50.44


Ultimately, I am disappointed with Lil'Gun in the 10mm. Of course, I never expected world-shattering velocities. But I was hopeful that I would see very good velocities with good shot-to-shot velocity consistency. Unfortunately, the consistency is terrible. Lil'Gun is the superstar in the .357 Magnum and is great in many magnum cartridges. It just doesn't look like the right propellant for the 10mm. It may be possible to get great velocities and consistency in the Smith & Wesson 610 by loading the cartridges longer than 1.260". But in the automatics, you usually can't do that and expect reliability.

If someone has success with Lil'Gun in the 10mm, or even an interesting theory about what to try, please post it.
Bringsteen is offline   Reply With Quote