Nandy
09-13-2012, 06:00 PM
After I got all of the little details taken care off I headed to the range to try 2 loads. I shot with separate rest for the forearm (adjustable) and buttstock(sand bag). The chrono is about 40 feet. I cannot get it any closer as we shoot thru concrete tubes.
RL-22 for all loads. This is what I shot:
110 Switch Barrel Action - SAV-2 - Choate Varmint Stock - Leupold VX III 3.5-10x50
Brux (SSS) 7MM RM, 1-9, 26", Varmint Barrel, SSS Brake
Ignore the center target. It was there just for me to make sure I was in paper. The lower 2 shots on that target where shot at target 7.
http://i305.photobucket.com/albums/nn215/nandy_temp/20120911_145636.jpg
Date: 9/11/2012
Caliber: 7mm RM
Bullet: Accubond
Grains: 140
200 Yds
String-----Gr.----Grp Size----Std Dev---Ext Spread-----Hi Vel-----Low Vel---Ave Vel----Sht 1------Sht 2------Sht 3
1---------66.5---1.343----------24-------47----------3003------2956------2976------3003------2969------2956
2---------66.8---3.213----------21-------40----------2989------2949------2973------2949------2989------2982
3---------67.1---2.817----------20-------34----------3030------2996------3019------2996------3030------3030
4---------67.4---2.245----------35-------49----------3065------3016------3041------3016------****-----3065
5---------67.7---2.746----------12-------21----------3065------3044------3051------3065------3044------3044
6---------68-----0.547----------20-------35----------3058------3023------3046------3023------3058------3058
7---------68.3---3.556----------25-------49----------3093------3044------3072------3044------3093------3079
8---------68.6---4.137----------17-------29----------3122------3093------3112 ------3093------3122------3122
I would shoot the first cartridge for each load at the pertaining target. Meaning I shot all the loads in the column "shot 1" then the next column and so on.
My best 2 groups are 6 and 4 (if I ignore that high shot). I did have a problem were I forgot to change the string number for the last set of shots and to make it worst the chrono missed one shot. I know my the "shot 1" column is correct so I looked at the numbers and determined that shot 4 on column "shot 2" is probably the one that was missing.
http://i305.photobucket.com/albums/nn215/nandy_temp/20120911_145636_grp6.jpg
http://i305.photobucket.com/albums/nn215/nandy_temp/20120911_145636_grp4.jpg
Date: 9/11/2012
Caliber: 7mm RM
Bullet: Speer Hot Cor
Grains: 145
100 yds
Hi Vel: 3044
Low Vel: 2962
Ave Vel: 3004
Ext Spread: 82
Std Dev: 32
Velocity
3023
2969
2989
2962
2982
3044
3030
3037
This shot set was worst as the chrono missed 3 shots. I do have to take responsibility on this group as the chrono was not well aligned. I had 2 test loads to make sure they were in paper, these loads were 66.6 if I recall right then I shot the rest 66.2, 66.5, 66.8 in similar order as the Nosler bullets. I have to guess that the chrono missed one of the test loads but it is hard to tell where was the other shot lost...
http://i305.photobucket.com/albums/nn215/nandy_temp/20120911_145620.jpg
My best group is in the .4??" (sorry, I dont have that number handy):
http://i305.photobucket.com/albums/nn215/nandy_temp/20120911_145620_grp1.jpg
I am going to load those 3 best and see if I can replicate the grouping. Any advise, ideas or positive criticism? I was amazed on how those groups went from open to suddenly tight...
Thanks.
RL-22 for all loads. This is what I shot:
110 Switch Barrel Action - SAV-2 - Choate Varmint Stock - Leupold VX III 3.5-10x50
Brux (SSS) 7MM RM, 1-9, 26", Varmint Barrel, SSS Brake
Ignore the center target. It was there just for me to make sure I was in paper. The lower 2 shots on that target where shot at target 7.
http://i305.photobucket.com/albums/nn215/nandy_temp/20120911_145636.jpg
Date: 9/11/2012
Caliber: 7mm RM
Bullet: Accubond
Grains: 140
200 Yds
String-----Gr.----Grp Size----Std Dev---Ext Spread-----Hi Vel-----Low Vel---Ave Vel----Sht 1------Sht 2------Sht 3
1---------66.5---1.343----------24-------47----------3003------2956------2976------3003------2969------2956
2---------66.8---3.213----------21-------40----------2989------2949------2973------2949------2989------2982
3---------67.1---2.817----------20-------34----------3030------2996------3019------2996------3030------3030
4---------67.4---2.245----------35-------49----------3065------3016------3041------3016------****-----3065
5---------67.7---2.746----------12-------21----------3065------3044------3051------3065------3044------3044
6---------68-----0.547----------20-------35----------3058------3023------3046------3023------3058------3058
7---------68.3---3.556----------25-------49----------3093------3044------3072------3044------3093------3079
8---------68.6---4.137----------17-------29----------3122------3093------3112 ------3093------3122------3122
I would shoot the first cartridge for each load at the pertaining target. Meaning I shot all the loads in the column "shot 1" then the next column and so on.
My best 2 groups are 6 and 4 (if I ignore that high shot). I did have a problem were I forgot to change the string number for the last set of shots and to make it worst the chrono missed one shot. I know my the "shot 1" column is correct so I looked at the numbers and determined that shot 4 on column "shot 2" is probably the one that was missing.
http://i305.photobucket.com/albums/nn215/nandy_temp/20120911_145636_grp6.jpg
http://i305.photobucket.com/albums/nn215/nandy_temp/20120911_145636_grp4.jpg
Date: 9/11/2012
Caliber: 7mm RM
Bullet: Speer Hot Cor
Grains: 145
100 yds
Hi Vel: 3044
Low Vel: 2962
Ave Vel: 3004
Ext Spread: 82
Std Dev: 32
Velocity
3023
2969
2989
2962
2982
3044
3030
3037
This shot set was worst as the chrono missed 3 shots. I do have to take responsibility on this group as the chrono was not well aligned. I had 2 test loads to make sure they were in paper, these loads were 66.6 if I recall right then I shot the rest 66.2, 66.5, 66.8 in similar order as the Nosler bullets. I have to guess that the chrono missed one of the test loads but it is hard to tell where was the other shot lost...
http://i305.photobucket.com/albums/nn215/nandy_temp/20120911_145620.jpg
My best group is in the .4??" (sorry, I dont have that number handy):
http://i305.photobucket.com/albums/nn215/nandy_temp/20120911_145620_grp1.jpg
I am going to load those 3 best and see if I can replicate the grouping. Any advise, ideas or positive criticism? I was amazed on how those groups went from open to suddenly tight...
Thanks.