What about 350s running 2550-2600? The 350s being 150-200 fps faster than the 400s. I have always expected that at some point there would be too much velocity and it would affect penetration. If anyone has such data it would be you.
So as to not confuse...... This is about Solids only......
@intj As for hard cold absolute "Data"....... a little bit, but not enough to be 100% sure........ enough experience to believe that your statement has truth to it. I believe, and suspect strongly that you reach a point with any given design that you just do not gain more depth of penetration at some upper end of velocity. This upper end is different with different Nose Profile Designs as well, It also will be different with the construction and material a Solid is made from. You will reach upper velocity quicker with copper than with brass, as copper will start to flow at lower velocities. Caliber also will come into play as well.
I was asked recently to do a study with different .308 caliber Copper CEB Solids. .308 is small caliber that has more effect than say .416 or .458 when it comes to flow and movement of material. At higher velocity impacts copper starts to deform, flow, and move, causing instability during terminal penetration.
Below are two bullets on the left that had a muzzle velocity of 2670 fps, you see the flow and movement of the meplat, compared to an bullet on the right that has not been fired.....
Muzzle velocity of 2340 fps showed much less deformation of the meplat, and gave deeper, and straighter penetration. In these cases, Less Velocity Gave you More Penetration, and straighter penetration than higher velocities. All concerning with Caliber and Material.
Nose Profiles of Solids react differently to the other Factors of Solid Penetration. I like the Barnes Flat Nose solids, I first used them in 2005 in Tanzania on buffalo, and they were great compared to what we had. In years of study and many tests in many calibers of these bullets I found they are do not react so much to increased velocity giving more depth of penetration. They reach a point of course to where more velocity really does not give you more penetration. A CEB #13 does react a bit more to added velocity, but it too seems to reach a point that is the upper end and will give no more as well. This leads me to believe that each bullet, each caliber, has a point of getting no returns for depth of penetration. The best example I have of this concept is a 325 gr CEB Solid. The Nose Projection on this bullet is longer than the Lever Solids, this one at .600.
We see a large difference in penetration from 1500-1600 fps to 2300 fps or so. But moving up to 2570 fps we don't see any gains in depth of penetration, I believe with this particular bullet we have reached the maximum depth that it is going to achieve at 2350 fps or so........ More velocity, did not give us more depth.
In years of testing nearly all the different nose profiles, I see the same thing. Some will do give better results than others with added velocity, but they all seem to reach a point that added velocity gives little return on depth of penetration.
Is there anything else that added velocity can have an impact on, with a Flat Nose Solid? Yes, there is another benefit to added velocity, and that is added trauma up front..... Flat Nose Solids hit hard and cause much more trauma than similar round nose that produce little or no trauma up front. More velocity, harder the hit up front and more trauma inflicted. This shows up in Terminal test work, and it also shows up in the field with animal reactions to taking the hit.
You have many considerations to take into account with Solids, Velocity is Factor #6 out of 8 total to be considered, but velocity also effects Nose Profile Factor #2, and Construction & Material Factor #3. Added velocity can have effect on poor or slower twist rates Factor #7. Unless you understand how all these Factors can have effect on other factors, it can become quite a study to sort out.