9mm Major Data

[A38337]

Gun: Bedell 9mm shorty, 4.5" KKM barrel, Bedell Ti 7 port comp. No ports in barrel.

Bullet: MG 124 CMJ

Powder:3N37

Primer: WSP

Case: Federal 9mm nickel plated

Chono and method:

Pact (about 8 yrs old)

Muzzle is 10' from front skyscreen

20 shot strings

Ambient temp approx 60 degrees

200' above sea level

OAL 1.150

7.4 grns = 1293 avg, 1326 hi, 1280 lo, 45 es, 10 sd, 8 ad

7.7 grns = 1321 1335 1306 29 7 5 (165.5 PF)

8.0 grns = 1350 1367 1315 51 12 8 (167.4 PF)

OAL 1.165

8.1 grns = 1386 1404 1366 37 10 8 (171.8 PF)

Primers are slightly flattened, and not cratered.

On Dan and Chuck's advice, I'm switching to Zero bullets and will post additional data in a week or two.

[Harmon]

ive had good luck with HS6 and 124s in my major 9mm.

I dont know if i would use too much 3n37 after hearing what JL hardy had to say about it.

[TimWarner]

Mind if I add this to my spreadsheet?

[A38337]

Tim - Go ahead!

Harmon - Dan says to use 3N37, so that's what I'm using. We'll see what happens, but everything else he has told me has been dead-on, so I have no plans on changing.

However, I'm going to try to develop a load with another powder, however, as I like to have a backup plan just in case something happens with Vihta.

[basman]

ive had good luck with HS6 and 124s in my major 9mm.

I dont know if i would use too much 3n37 after hearing what JL hardy had to say about it.

Harmon, what was up with the 3n37? I have been using HS6, 350 and playing with 7625, but 3N37 was going to be next.

Edited May 9, 2006 by basman

[smokshwn]

basman,

There is some info out there that says 3n37 eats barrels faster than the other powders. As always it seems to be anecdotal at best. To be honest I can't really see that there would be a huge difference between 37 vs. 3n38 vs n350. Some difference maybe, but not to the extent that one powder is fine and the very next on the burn chart will ruin your barrel. In the sense of the cartridge we are loading, we are at very high pressures and flame temps anyway.

I shoot Porno 9 as well and I like the 3n37 load in my Bedell gun. I have seen no adverse affects (nearing 18k rds) but I will keep the board posted.

[eric nielsen]

From what I've seen, 3n37 burns really clean and [looks like] it burns pretty hot as well.

If you have a 9Major S_I gun that runs reliably with that powder, to me that's by far the most important thing - #1: the gun runs. Sure beats picking up Super brass.

2nd & 3rd place would be - makes power factor, groups accurately. Maybe 10th place priority I'd put "feels soft" or similar.

[A38337]

New Data 5-12-06

Bedell Shorty 4.5" KKM barrel, no ports, Bedell Comp

65 degrees ambient temp.

Both loads below using 8.0 grains of 3N37, OAL of 1.165", Federal nickel 9mm brass, WSP primers (old style)

124 grn MG CMJ

Avg Vel 1370 (PF is 169.8)

Hi 1430

Lo 1337

Extreme Spread 93

Std Dev 21

Avg Dev 14

125 grn Zero JHP

Avg Vel 1400 (PF is 175)

Hi 1407

Lo 1384

ES 22

SD 6

AD 5

The Zero bullets are 30 FPS faster than the MG, which is worth 4 or 5 PF.

I'm going to reduce my powder charge to 7.7 in both bullets and try again.

[Harmon]

what is an old style primer?

[A38337]

The current WSP primers are copper colored and a little bit rough. The old ones were silver-colored (nickel?) and smooth.

I'm currently using some of the old ones.