id guess you dont wanna say actual lowest minimum expansion in public forum.. to keep people thinking thats the norm
but it would be interesting to hear the lowest expansion results with say a 199 hunter vs a 199 shock ( the hollow is larger on the shocks , correct ?? )
or any equal bullet weigh between the 2
I think 1800 fps minimum has been stated often enough. Always information that's new to some but certainly not hidden.
HP's are an interesting subject, ask me a year ago and I may have answered differently.
In the 2 you mention I'm guessing, but my guess would be as follows:
1) Shock Hammers typically retain 80% of shank
2) Hammer Hunters retain 60-70%
The SH will probably serve best closer, thinner bodied, thinner skinned game. Also the "standard" .308 diameter barrel has a 10" twist, (minimum recommended 10.5") which will yield a little better stability factor. Meaning impact will likely be square to the HP, and maximum expansion observed.
The 199 HH requires a minimum twist of 9.25", and still in my mind lags at that behind the 196". I have 2 barrels in the pipeline both 1-8", 1-7" if available.
It really doesn't matter which brand you're speaking of HP performance will depend on its integrity on impact, and actually hitting point first. The bigger HP will be friendlier in this regard.
A 270 Lever Hammer was built for Asian Buffalo. It has a bigger HP, a meatier meplat, and larger petals. It blew test media apart impressively. Killed buffalo very well on broadside shots, but lacked penetration on tougher angles.
So far the 248 HH has proved a better killer on buffalo than those heavier in the line up. The thick hide of the buffalo opening those bullets a little slower, the petals coming off more timely, and a better stability factor providing a better wound track.
On other thinner animals the Lever Hammer proved a more sudden killer. One report has about 5' of penetration in a moose.
HP size across the line has increased since inception. Also not a secret, or nefarious, just new information to some.