9mm Mid Range Loads


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ernierod
November 8, 2006, 06:37 AM
Looking for loading data for 9mm,using 115-125gr cast lead bullets, in the velocity range 700-800fps, using n310 or n320 powder.Any experience out there??Thanks Erod

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spencerhut
November 8, 2006, 02:18 PM
Do you have a Lee loading manual? Use the starting charges for 9MM and the powder you have on hand. You'll be fine.

RecoilRob
November 8, 2006, 08:00 PM
I have no experience with the Vit N310 but it is very similar in burning speed to Bullseye.

Normally, it is VERY unwise to try to extrapolate a load by comparing burn speed charts but, in this case where you are looking for a very reduced velocity, I think we can proceed just fine.

The max Bullseye load for a 125grn lead is 4.9 for 1165fps. Considering that, I would start with maybe 3.5grns of the N310 and see if the pistol functions properly. 3.5 will be plenty to get the bullet out of the tube and should have little chance of sticking one.

I am assuming that you are shooting a short barrelled pistol. If this is for a carbine, I'd bump the initial load to 4grns to make sure it makes it to the end of the barrel.

Most 9mm pistols will have trouble functioning reliably with a 115 in the 700's so your load development will consist of finding the minimum needed for reliability rather than a specific velocity.

If the 3.5 load works well, gradually reduce it until the pistol fails to eject or feed. Go back up a couple of tenths and call it good.

Of course, if the 3.5 doesn't run the pistol well, increase by tenths until it does.

If you cannot find the specific load info you desire, at least in this case, you can work up your own safely so long as you realise what you are doing and proceed gradually. Good luck.

.45man
November 10, 2006, 08:43 AM
ernierod,

I have several mild 9mm loads that work great in a 92FS and P-35. Check them out HERE (http://home.comcast.net/~45man/misc_images/Load_Data_6_Aug_06.xls): Just click on the 9mm tab at the bottom.

Best wishes!!

Norm Lee
November 10, 2006, 07:24 PM
Here are some pleasant loads using 115 gr bullets and N310:

3.3 gr. VV N 310
115 gr. JHP Bullet
Velocity power factor
996.00 114.54
1018.00 117.07
1014.00 116.61
1021.00 117.42
1017.00 116.96
993.00 114.20
1008.00 115.92
1008.00 115.92
988.00 113.62
1015.00 116.73
Total 10078.00
Mean 1007.80 115.90
Standard deviation 11.56

New 9mm Load

3.5 gr. VV N 310
115 gr. JHP Bullet
Velocity power factor
1015.00 116.73
1055.00 121.33
1046.00 120.29
1040.00 119.60
1029.00 118.34
1037.00 119.26
1036.00 119.14
1022.00 117.53
1046.00 120.29
1033.00 118.80
Total 10359.00
Mean 1035.90 119.13
Standard deviation 11.89
3.6 + gr. VV N 310 OAL=
115.00 gr. Bulk jhp
Velocity power factor
1049.00 120.64
1049.00 120.64
1070.00 123.05
1074.00 123.51
1079.00 124.09
1074.00 123.51
1076.00 123.74
1061.00 122.02
1075.00 123.63
1040.00 119.60
Total 10647.00
Mean 1064.70 122.44
Standard deviation 13.97

In an e-mail exchange with Vihtavuori I got the following start load recommendations:
115 gr bullets, 3.1 N310
122 gr bullets, 3.0 N310
147 gr bullets, 2.3 N310

Recommended max with 115 gr. bullets was given as 3.5 gr. N 310

This is a pretty light load and showed no pressure signs whatsoever when I tried it. The recommended start charge would not cycle my HP with a standard recoil spring.

Cheers,

Norm

TonyT
November 11, 2006, 09:11 AM
The 2002 Vihtavouri manual list the following data for 9mm and the Intercast 124 gr. LSWC:
3.8 gr. N-320 = 1086 fps
4.2 gr. N-320 = 1138 fps
The manual does not list any load data for N-310 in 9mm.

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