It should be somewhere between 88, 6 and 90, 3, depending on whether I adjust only BA or BA and Z0. I'll look into it and post something, when I get the right load.
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338 Norma Mag Load Data
- Thread starter diderr
- Start date
Range report:
Yesterday I went and shot 3-shot charges from 88,6-91,0 grains Norma 217 with 300gr Berger hybrids through my Stiller Tac 338 NM, 28" Lilja Barrel 10 twist. It yielded the following data measured with a Magnetospeed V2. Everything is shot at 100m:
88,6gn:
1: 2723.
2: 2724.
3: 2726.
Avg: 2724.
SD: 1.
![20140830_075653[1].jpg](https://www.snipershide.com/shooting/data/attachments/17/17142-fcb3b93c2c98fe264d5815957a77bec9.jpg "20140830_075653[1].jpg")
88,9gn:
1: 2739.
2: 2745.
3: 2723.
Avg: 2735.
SD: 11.
![20140830_080215[1].jpg](https://www.snipershide.com/shooting/data/attachments/17/17143-7ad6ab805257a7e60db3c5bffda9e4f5.jpg "20140830_080215[1].jpg")
89,2gn:
1: 2754.
2: 2736.
3: 2753.
Avg: 2747.
SD: 10.
![20140830_080351[1].jpg](https://www.snipershide.com/shooting/data/attachments/17/17144-7eb60088264008bffbc8d8c78a735aad.jpg "20140830_080351[1].jpg")
89,5gn:
1: 2770.
2: 2768.
3: 2762.
Avg: 2766.
SD: 4.
![20140830_080524[1].jpg](https://www.snipershide.com/shooting/data/attachments/17/17145-ca75aca9a8df7a20c699a7244d9ae7f9.jpg "20140830_080524[1].jpg")
89,8gn:
1: 2788.
2: 2773.
3: 2788.
Avg: 2782.
SD: 7.
![20140830_080710[1].jpg](https://www.snipershide.com/shooting/data/attachments/17/17146-83a37b26bb88694295eb988135d4ae0e.jpg "20140830_080710[1].jpg")
To be continued.......
Yesterday I went and shot 3-shot charges from 88,6-91,0 grains Norma 217 with 300gr Berger hybrids through my Stiller Tac 338 NM, 28" Lilja Barrel 10 twist. It yielded the following data measured with a Magnetospeed V2. Everything is shot at 100m:
88,6gn:
1: 2723.
2: 2724.
3: 2726.
Avg: 2724.
SD: 1.
88,9gn:
1: 2739.
2: 2745.
3: 2723.
Avg: 2735.
SD: 11.
89,2gn:
1: 2754.
2: 2736.
3: 2753.
Avg: 2747.
SD: 10.
89,5gn:
1: 2770.
2: 2768.
3: 2762.
Avg: 2766.
SD: 4.
89,8gn:
1: 2788.
2: 2773.
3: 2788.
Avg: 2782.
SD: 7.
To be continued.......
Last edited:
90,1gn:
1: 2783.
2: 2799.
3: 2783.
Avg: 2792.
SD: 8.
![20140830_080827[1].jpg](https://www.snipershide.com/shooting/data/attachments/17/17147-18c86ce2fd1f9189c6a7a5a7a810635a.jpg "20140830_080827[1].jpg")
90,4gn:
1: 2813.
2: 2790.
3: 22808.
Avg: 22803.
SD: 12.
![20140830_081119[1].jpg](https://www.snipershide.com/shooting/data/attachments/17/17148-fb5a9e965b24a2e4b769b0ef40a151d9.jpg "20140830_081119[1].jpg")
90,7gn:
1: 2831.
2: 2834.
3: 2837.
Avg: 2834.
SD: 3.
![20140830_081343[1].jpg](https://www.snipershide.com/shooting/data/attachments/17/17150-691fedc0ecd7372b81a65f127612624b.jpg "20140830_081343[1].jpg")
91,0gn:
1: 2837.
2: 2818.
3: 2840.
Avg: 2831.
SD: 11.
![20140830_081538[1].jpg](https://www.snipershide.com/shooting/data/attachments/17/17151-67243a930eeed39656a6042b5370fd3c.jpg "20140830_081538[1].jpg")
For me it seems I need to try again from 89,5-90,7. Granted groups 89,8 and 90,1 looks like they are grouping the best, but my shooting may also have something to do with groups being more open in the other charges.
Velocities are rather nice and the rifle feels smoother at lower charges.
Maybe the load development part should be moved to a more appropriate section? I'll post the finished load here, once I have it.
1: 2783.
2: 2799.
3: 2783.
Avg: 2792.
SD: 8.
90,4gn:
1: 2813.
2: 2790.
3: 22808.
Avg: 22803.
SD: 12.
90,7gn:
1: 2831.
2: 2834.
3: 2837.
Avg: 2834.
SD: 3.
91,0gn:
1: 2837.
2: 2818.
3: 2840.
Avg: 2831.
SD: 11.
For me it seems I need to try again from 89,5-90,7. Granted groups 89,8 and 90,1 looks like they are grouping the best, but my shooting may also have something to do with groups being more open in the other charges.
Velocities are rather nice and the rifle feels smoother at lower charges.
Maybe the load development part should be moved to a more appropriate section? I'll post the finished load here, once I have it.
Thank you and yes, it's at 100m. The recoil is somewhat harder than 308win, so I need to learn how to load the bipod a bit better than what I'm doing right now
PM me your email and i'll send it to you. I really need to just post the data for everyone to use. I know it's saved some people time and money.
Deano
Deano
338 Norma Magnum – Load Data
-Case length (min) -2.492” (max) -2.502”
-COAL -3.602 w/300grn bullet
Powder Powder Weight Bullet Weight FPS Notes
H1000 89grn 300grn SMK 2830fps Benchmark 27” 5grove
H1000 88grn 300grn OTM 2750fps .005 off lands
H1000 88grn 300grn OTM 2805-2825fps
H1000 88.7grn 300grn OTM 2735fps Benchmark 26” 9.5T .060 off lands
Retumbo 85 – 92.5grns
Retumbo 87.0grn 300grn OTM 2720fps 26” Tube
Retumbo 89.0grn 300grn
Retumbo 91.4grn 300grn
Retumbo 91.5-93.0 285grn
Retumbo 87.5 grn 300grn OTM 2725-2750 .005 off
Retumbo 92.5grn 300grn Scenar 2860fps
Retumbo 93.5grn 300grn 2740fps 26” barrel
VV N570 87 – 91.0grns
87grn-2591fps 88grn-2652fps 89grn-2716fps 90grn-2736fps 91.0grn-2802fps
VV N570 89.0grn 300grn Starting load
VV N570 90.5grn 300grn OTM 2750fps Skinney_7
VV N570 91.0grn 300grn SMK
VV N570 92.0grn 300grn
VV N570 94.0grn 300grn 2790fps 26” tube
Ramshot Mag 91.0 – 93.5grn
90.5grn-2776fp 91.0grn-2778fps 91.5grn-2786fps 92.0grn-2787fps 92.5grn-2824fps
Ramshot Mag 91.0-92.0grn 300grn 2775-2800fps WLRMP/26” bbl
Ramshot Mag 93.0grn 300grn 2800fps 26” Tube
Ramshot Mag 91.5grn 285grn 2823fps 92grn = 2790fps
Ramshot Mag 92.5grn 300grn 2825fps 26”bbl, 3.602”
RL-22 83.5 – 85.0grn 300grn
RL-22 82.5grn 300grn 2649fps 8200’asl/28”bbl
RL-22 84.0grn 300grn 2775fps 26” Tube
RL-22 84.2grn 300grn 2785gps Into lands .003
RL-22 84.5grn 300grn 2780fps (review)
RL-22 86.0grn 300grn OTM 2850fps 3.634” COAL
RL-22 90.0grn 250grn 3150fps
US869 90.0 – 101.3 300grn 100.0grn ~2710fps
Hope this helps guys.
Deano
-Case length (min) -2.492” (max) -2.502”
-COAL -3.602 w/300grn bullet
Powder Powder Weight Bullet Weight FPS Notes
H1000 89grn 300grn SMK 2830fps Benchmark 27” 5grove
H1000 88grn 300grn OTM 2750fps .005 off lands
H1000 88grn 300grn OTM 2805-2825fps
H1000 88.7grn 300grn OTM 2735fps Benchmark 26” 9.5T .060 off lands
Retumbo 85 – 92.5grns
Retumbo 87.0grn 300grn OTM 2720fps 26” Tube
Retumbo 89.0grn 300grn
Retumbo 91.4grn 300grn
Retumbo 91.5-93.0 285grn
Retumbo 87.5 grn 300grn OTM 2725-2750 .005 off
Retumbo 92.5grn 300grn Scenar 2860fps
Retumbo 93.5grn 300grn 2740fps 26” barrel
VV N570 87 – 91.0grns
87grn-2591fps 88grn-2652fps 89grn-2716fps 90grn-2736fps 91.0grn-2802fps
VV N570 89.0grn 300grn Starting load
VV N570 90.5grn 300grn OTM 2750fps Skinney_7
VV N570 91.0grn 300grn SMK
VV N570 92.0grn 300grn
VV N570 94.0grn 300grn 2790fps 26” tube
Ramshot Mag 91.0 – 93.5grn
90.5grn-2776fp 91.0grn-2778fps 91.5grn-2786fps 92.0grn-2787fps 92.5grn-2824fps
Ramshot Mag 91.0-92.0grn 300grn 2775-2800fps WLRMP/26” bbl
Ramshot Mag 93.0grn 300grn 2800fps 26” Tube
Ramshot Mag 91.5grn 285grn 2823fps 92grn = 2790fps
Ramshot Mag 92.5grn 300grn 2825fps 26”bbl, 3.602”
RL-22 83.5 – 85.0grn 300grn
RL-22 82.5grn 300grn 2649fps 8200’asl/28”bbl
RL-22 84.0grn 300grn 2775fps 26” Tube
RL-22 84.2grn 300grn 2785gps Into lands .003
RL-22 84.5grn 300grn 2780fps (review)
RL-22 86.0grn 300grn OTM 2850fps 3.634” COAL
RL-22 90.0grn 250grn 3150fps
US869 90.0 – 101.3 300grn 100.0grn ~2710fps
Hope this helps guys.
Deano
I must have a bunk lot of retumbo. Loading 87.4gr under a 300gr hybrid (running 2715fps) and have pressure signs as well as heavy bolt lift but shoots well.
Today I went back and shot some 4 shot groups of 89,7-90,7 of Norma 217 behind a 300grain Berger hybrid at 300m. CBTO.2,8285.
Stiller tac 338 and 28" Lilja.
Granted my shooting was rather lousy today, and as such I would like some guidance or interpretation on whether I should proceed based on SD alone or on grouping? My groupings weren't very good, so having that top go on isn't very reassuring.
In some of the last groups, the first shot is markedly higher than the following 3.
89,7 grains:
Min: 2757.
Max: 2790.
Avg: 2774.
SD: 15.
89,9 grains:
Min: 2770.
Max: 2813.
Avg: 2794.
SD: 17.
90,1 grains:
Min: 2794.
Max: 2826.
Avg: 2813.
SD: 13.
90,3 grains:
Min: 2804.
Max: 2816.
Avg: 2811.
SD: 5.
90,5 grains:
Min: 2815.
Max: 2821.
Avg: 2818.
SD: 3.
90,7 grains:
Min: 2813.
Max: 2829.
Avg: 2821.
SD: 8.
Stiller tac 338 and 28" Lilja.
Granted my shooting was rather lousy today, and as such I would like some guidance or interpretation on whether I should proceed based on SD alone or on grouping? My groupings weren't very good, so having that top go on isn't very reassuring.
In some of the last groups, the first shot is markedly higher than the following 3.
89,7 grains:
Min: 2757.
Max: 2790.
Avg: 2774.
SD: 15.
89,9 grains:
Min: 2770.
Max: 2813.
Avg: 2794.
SD: 17.
90,1 grains:
Min: 2794.
Max: 2826.
Avg: 2813.
SD: 13.
90,3 grains:
Min: 2804.
Max: 2816.
Avg: 2811.
SD: 5.
90,5 grains:
Min: 2815.
Max: 2821.
Avg: 2818.
SD: 3.
90,7 grains:
Min: 2813.
Max: 2829.
Avg: 2821.
SD: 8.
Last edited:
Some days a guy just can't get his head on straight with these big magnums. If you're having an off day it will show in your groups. I'd say try and do another batch of the low ES charges just to see if it's you or the load. I'd look at the 2818fps as a node and work around it a little.
Deano
Deano
After going back at 100m, the final load looks like:
90, 7 grains of Norma 217 behind a 300grain Berger hybrid.
CBTO.2,8285.
Avg. Velocity: 2836.
90, 7 grains of Norma 217 behind a 300grain Berger hybrid.
CBTO.2,8285.
Avg. Velocity: 2836.
I would push your shooting out to 1K and figure it out. 100m isn't very far and I've had horrible groups at 100yds that showed no promise besides having a low ES/SD until i pushed them out and they stabilize nice and group incredible.
xdeano
xdeano
I would love that, but all we have at those ranges are falling targets.
I can do it at 300m with Electronic reading, but thats about it.
Best groups/stats were at 90,3, 90, 5 and 90, 7. Best overall was 90,7.
I can do it at 300m with Electronic reading, but thats about it.
Best groups/stats were at 90,3, 90, 5 and 90, 7. Best overall was 90,7.
My brother and I have the same experience, with my 308 and with my Norma. I posted that and I got made fun of by everyone even Lowlight. Saying that it's total BS... glad to hear that a professional as yourself Deano has experienced the same thing
Has anyone tried Norma MRP with the 300 Grn bergers? It is basically R22 but I wonder if it acts the same way?
Anyone have any experience with it?
Anyone have any experience with it?
I don't have personal experience with it but I know alot of people shoot it in 338LM in Denmark and are happy with it.
This is just a general info post….. Midway USA has Vinh 565 and 570 in stock now, both 1lb and 8 lb. Just bought one of each for my Norma and Lapua .338’s.
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