I am curious about an earlier comment describing the Woodleigh Hydro solids as a "limited penetration" solid. My understanding was that the design accomplished two things compare to flat nosed all-brass solids - deeper penetration while at the same time causing more tissue damage because of a wider permanent wound channel. Is this not correct?
The Woodleigh Hydro and the North Fork CPS non-expanding version are considered "Limited Penetration Solids"........ They are not designed to be deep diving deep penetration solids, such as the North Fork Solid and CEB #13 Solids. Two different concepts.
You are correct, the Limited Penetration solids does cause more tissue damage, however does not penetrate as deep. Why? Let me see if I can explain this so it is easier to understand........... Both of these have more surface area that contacts tissue and or medium. The Cup Point design on both will present more surface area in contact with tissue or medium. John, the previous owner of North Fork was a good friend of mine and he explained it like this "The larger surface area of the CPS fools the medium or tissue into thinking the bullet is bigger than it really is". For instance, what happens when you hit tissue with a 65% meplat Solid as opposed to an 80% meplat Solid? The 65% meplat will penetrate much deeper than the 80% meplat, but will not disrupt as much tissue as the 80% meplat.The larger meplat will destroy more tissue, but not able to penetrate as deep.
You can see this in this example;
The Woodleigh Hydro is exactly the same, it presents a larger surface area than a deep diving solid, it is designed to disrupt more tissue, but by doing so, cannot penetrate as deep.
Now two of the very best designs for Deep and Straight line penetration Solids are the Cutting Edge #13 Solid with a 67% Meplat and the North Fork Solid at 68% Meplat. These are designed to give the deepest penetration of any solids out there. 65% Meplat is required for Terminal Stability during penetration, both CEB and North Fork exceed 65%. Yes, a larger meplat would mean more tissue destruction, but less depth of penetration, and larger meplat size than 68% begins to be a problem when feeding properly designed control feed bolt guns, Winchester M70s. We have tested up to 90% meplat size, but that won't feed/function in anything. Going above 70% meplat starts to give issues.
Here are the Deep Divers;
Even a much smaller Deep Diving Solid out penetrates the larger Limited Penetration Solids.......
I hope I explained this good enough to answer your question?