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I have tested a lot of bullets, but once again have I come back to this one.
My rifle that I use for all the data and info that I will post is a custom Rem 700SA.
This barrel is in HV-contour and in 1:8 twist Krieger. The length of the barrel is from boltface to muzzle 653mm (25,7")
The throat have been extended 2,5mm (0,09") from the SAAMI chamber "standard" so that I can load longer COAL witch give me more room in the case for more powder.
The distance to the lands = jump, is now at the start 1.0mm (~0.0393"). Have the correct COAL measurement at home, but the BTO for this with a Hornady 6,5mm insert is 46,4mm.
I also use a Aimsport Triton 42S silencer. MV and speed data is done with a Magnetospeed Sporter.
So the bullet is the Lapua Scenar 108gr.
Have used this bullet before in another barrel with standard SAAMI-specs. And it shot really great. After the Krieger was installed I went directly into testing heavy bullets in 140gr and 130gr to find a heavy bullet for long ranges. (Separate threads for these tests exist here on the forum if someone is interested.)
For this test I have started with the Vihtavuori N530.
I have done several test already, but I will post the different test here so there is some background to where I started.
In my shorter and standard Grendel I tested this bullet and this powder up to 27,0gr. But since I had a other powder that worked well, no more testing was done. So this was my starting point for this test with the Krieger. I knew that I could fit more powder in, but wanted to take it slow and work my way up with the loads.
So first test was done from 26,6gr of N530 and up to 28,2gr in 0,2gr increments.
And here result in a graph:
GR-KR 108gr Scenar N530 Test 1.JPG
In this first test, I used a muzzle break and not the silencer. So the following test I have been using the silencer, so the speeds is not really good for comparison.
No signs of high pressure so for the next test, more powder was used.
Loaded from 27,8gr up to 28,8gr but now with 0,1gr increments.
Here the result from the second test in a graph:
GR-KR 108gr Scenar N530 Test 2.JPG
Got some really high speeds on the highest loads, but no pressure signs. It looked to be a good speed node around 28,6gr and maybe around 28,3-28,4gr. I focused on those two charges but it ended up in a third test with loads from 28,2gr up to 29,1gr in 0,1gr increments. Pushing it really high with the 29,1gr but all cases inspected for high pressure.
Here is the result from the third test in a graph:
GR-KR 108gr Scenar N530 Test 3.JPG
This test was a good confirmation that I did found a really good flat spot and node in the 29,3-29,4gr load. Also a higher node appeared at 29,0gr.
These two loads was the "center of attention" for the forth test. For the lower load 28,3gr was the center and loaded from 28,1gr up to 28,5gr in 0,1gr increments. The load 28,0gr was CBS and sighters.
On the higher node the load 29,0 was the center and loaded from 28,8gr up to 29,2gr.
Here is the result from the forth test in a graph:
GR-KR 108gr Scenar N530 Test 4.JPG
Once again I got good info that I have found two good loads.
I have not yet done any shooting on the target for groups, since all shots have been with different loads. However, I had a target for other shooting left and for the lower testload on this forth test, the 5 loads from 28,1gr up to 28,5 was fired at this target. The goal was absolutely not to shoot any group, but this was the result on the target for this small ladder test:
GR-KR 108gr Scenar N530 Test 4.1.JPG
There is four bullets in a line and the last bullet was on the right, and my fault alone.
So this gives great confident that the bullet and load can shoot.
For the next test, I have loaded 10pcs of the 28,4gr and 10pcs of the 29,0gr. I will shoot 5-shot groups a target and at the same time collect data for the 10pcs to get average speed and SD/ES.
This test will be done tomorrow, if all works well. So result will follow.
My rifle that I use for all the data and info that I will post is a custom Rem 700SA.
This barrel is in HV-contour and in 1:8 twist Krieger. The length of the barrel is from boltface to muzzle 653mm (25,7")
The throat have been extended 2,5mm (0,09") from the SAAMI chamber "standard" so that I can load longer COAL witch give me more room in the case for more powder.
The distance to the lands = jump, is now at the start 1.0mm (~0.0393"). Have the correct COAL measurement at home, but the BTO for this with a Hornady 6,5mm insert is 46,4mm.
I also use a Aimsport Triton 42S silencer. MV and speed data is done with a Magnetospeed Sporter.
So the bullet is the Lapua Scenar 108gr.
Have used this bullet before in another barrel with standard SAAMI-specs. And it shot really great. After the Krieger was installed I went directly into testing heavy bullets in 140gr and 130gr to find a heavy bullet for long ranges. (Separate threads for these tests exist here on the forum if someone is interested.)
For this test I have started with the Vihtavuori N530.
I have done several test already, but I will post the different test here so there is some background to where I started.
In my shorter and standard Grendel I tested this bullet and this powder up to 27,0gr. But since I had a other powder that worked well, no more testing was done. So this was my starting point for this test with the Krieger. I knew that I could fit more powder in, but wanted to take it slow and work my way up with the loads.
So first test was done from 26,6gr of N530 and up to 28,2gr in 0,2gr increments.
And here result in a graph:
GR-KR 108gr Scenar N530 Test 1.JPG
In this first test, I used a muzzle break and not the silencer. So the following test I have been using the silencer, so the speeds is not really good for comparison.
No signs of high pressure so for the next test, more powder was used.
Loaded from 27,8gr up to 28,8gr but now with 0,1gr increments.
Here the result from the second test in a graph:
GR-KR 108gr Scenar N530 Test 2.JPG
Got some really high speeds on the highest loads, but no pressure signs. It looked to be a good speed node around 28,6gr and maybe around 28,3-28,4gr. I focused on those two charges but it ended up in a third test with loads from 28,2gr up to 29,1gr in 0,1gr increments. Pushing it really high with the 29,1gr but all cases inspected for high pressure.
Here is the result from the third test in a graph:
GR-KR 108gr Scenar N530 Test 3.JPG
This test was a good confirmation that I did found a really good flat spot and node in the 29,3-29,4gr load. Also a higher node appeared at 29,0gr.
These two loads was the "center of attention" for the forth test. For the lower load 28,3gr was the center and loaded from 28,1gr up to 28,5gr in 0,1gr increments. The load 28,0gr was CBS and sighters.
On the higher node the load 29,0 was the center and loaded from 28,8gr up to 29,2gr.
Here is the result from the forth test in a graph:
GR-KR 108gr Scenar N530 Test 4.JPG
Once again I got good info that I have found two good loads.
I have not yet done any shooting on the target for groups, since all shots have been with different loads. However, I had a target for other shooting left and for the lower testload on this forth test, the 5 loads from 28,1gr up to 28,5 was fired at this target. The goal was absolutely not to shoot any group, but this was the result on the target for this small ladder test:
GR-KR 108gr Scenar N530 Test 4.1.JPG
There is four bullets in a line and the last bullet was on the right, and my fault alone.
So this gives great confident that the bullet and load can shoot.
For the next test, I have loaded 10pcs of the 28,4gr and 10pcs of the 29,0gr. I will shoot 5-shot groups a target and at the same time collect data for the 10pcs to get average speed and SD/ES.
This test will be done tomorrow, if all works well. So result will follow.
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