I wouldn't expect an exit with either... and I wouldn't NOT expect an exit with either.
The concensus I was reading was that they are pretty inconsistent. If they do pass through, expect a pretty substantial hole. If they don't, expect to see even more jello in the cavity.
I have a Sirui Am-284, I was happy with it for binos and light rifle work.
I did not like how short it was. I installed a riser on it, and it just made it too funky to carry. when I bought my Leofoto with the 55mm head, I was quite surprised how much difference the leg diameter made for...
This is a model 10 BA Stealth SA take off that I picked up a while back. Tried it, would like to take this rifle back to a stock or a different chassis. It does have some small rub marks from the past couple hunting seasons, I can send you more detailed pics if you are concerned.
Short Action...
Leofoto Ls 364 is what I have. Works great for the money. I refuse to try a $800+ tripod so I don't know what I am missing. But the 364 is a great unit for the money
MDT vertical grip Premier, Brand new in the box still - $50 shipped
MDT Vertical grip Elite, took the the range once - $80 shipped
Both - $120 shipped
Bought them, installed one on a ruger precision 22 and just preferred my hogue grip.
Trades considered chassis parts, rails, etc.