depending on barrel length, with a 250gr Keith. However, based on my experience, that plain base bullet is not going to be happy at that velocity unless it is harder than woodpecker lips.

This prompts the question about hunting with a non-expanding bullet. Some states consider hardcast to be the same as FMJ bullets and make no allowance for meplats. No idea how the possum cop would ascertain the hardness of your bullet to see if it is expanding or non-expanding. YMMV.

But it will surely make two holes in a deer.

Might be better to back the Keith down to handgun velocities for a more harmonious outcome.

I don't know about the henry but marlins and rossis often have feeding issues with that bullet unless either deep seated or loaded in special cases.

I agree with RayLee. I never had luck with the Keith style bullet feeding in my Rossi or Marlin. I did use other bullets out of molds by LBT, JDJ, LEI, and MP. I used 240grn and a load for rifles from the Lyman manual of 24 grns of 4227. That is a max load and would kick the snot out of me in a Rossi and was not much better in the Marlin. I have since backed off to 22 grns but The next batch is going to be using 10grns of Unique or its equivalent load of universal clays.

Will they feed? In magnum brass they are too long to feed from the magazine of both my Marlin 1894 and Browning 92. The only levergun that I know will feed Keith bullets in magnum brass is the 94 Winchester, although the early 336 44 magnums probably would too,

I have had better results with 2400 and H4227 and plain base bullets than H110. With jacketed 240gr I have got over 1800 FPS using H110 in a carbine.

With something like WW alloy I would think you would top out around 1400-1500 if you want minimal leading and best accuracy. I have been shooting a 245gr RNFP in magnum brass with 6.5gr of Red Dot in my leverguns lately. They are going about 1100 FPS.

Something like Unique or HS6 would get you in that 1400 FPS range out of a carbine, with much less blast.