I have not read any specs. on the new Henry rifle.
Lets hope Henry has their act a bit more thought out than Marlin. My Marlin 1894 in .32 H&R Magnum has a large chamber throat or ball-seat if you will. I am able to feed, chamber and extract the NEI No. 82 122-grain bullet without difficulty at .315" diameter. Groove diameter on my Marlin is slightly over .314" as best I can measure. The NEI No. 82 is a sort of LBT type bullet with wide meplat and the weight forward. This bullet shoots well in the Marlin rifle.
I cast these bullets soft, between 8 and 10 bhn and use a gas check. When loaded between 1,300 and 1,1400 fps this bullet will generally remain in a raccoon when I am shooting up into trees. Delivering a heavy shock to loosen their grip and bring them out of the tree I don't worry too much about bullets leaving the general area.
The blue steel Henry should make a good small game rifle.


Slim