I've been wondering if a simple chamber polish would solve these extraction issues. A drill, a dowel, and a rag with polishing compound might work wonders.
Also, I just learned about Rossi's break open polymer action single shot pistol (Brawler, just over 2 lbs) and rifle (Tuffy, ~3 lbs) in 45/410. If a fella wanted a way to launch heavy subsonic .452 slugs, he could likely use .444 brass expanded to .45 (see 450 Mongo)...
Unless I'm missing something, and assuming both are the same level of availability (not very), the 6 Max seems like a complex way to use more expensive brass and still end up with basically a 6 TCU - which uses .223 brass.
I do like the idea of a 6mm, but longer case lengths don't mate well...
OK, back to the original question:
What would be the best ~55 gr .224 deer bullet, and what kind of wound channel would it make at 1600-2200 fps? I still think the 53 gr V-Max is the best option...
What Timberline is saying is that you need to read the 223 thread, and prepare to have your eyes opened. KE is basically irrelevant; wound channel is everything. A 338 with a FMJ has all the numerical measurements that you cite are lacking in the Hornet, yet you realize that would be unethical...
This is, of course, a natural progression from the 223 thread, given the 223/77 is demonstrably able to cleanly take large ungulates, but I'm interested in specific bullet info for smaller bullets and smaller game. If one were to use a 22 Hornet for deer, what would a 50-55 gr varmint type...
More hypotheticals: With the fixed breech and 16" barrel, the Stowaway in 5.7x28 should be able to push a 55 gr V-max to ~2400 fps with Lil-Gun powder, which would stay above 1600 fps out to 250 yds. Certainly sounds deer-worthy to me.
Also musing around this thought in reference to that Stowaway: if the 223/77 TMK is so capable on elk sized game, what about the 5.7, with something like a 50 gr Vmax, on deer? Hypothetically speaking of course.