Does anyone know what the bore diameter will be?

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,
Thank you for the information, especially the lead bullet info. Would you be willing to share the powder and load data as well?

I am looking for a good load for night time varmint hunting and it sounds like you have a good one. I was thinking about the 85gr XTP at about 1,600fps. It should be a real killer inside 100 yards without blowing a yote up too bad.

Thanks again!

I don’t shoot bullets lighter than 100 grains in the .327 Federal. I look at it like a .357 Maximum – a heavy bullet cartridge.
I see the .327 Federal as a great combination for called critters at dusk and at night. Using a rest or sticks the big Blackhawk and the GP100 do well if you are not presented with multiple shots, they will put a few spots in your eyes when shooting at night.
I have been debating how to discuss heavy bullet loads in the .327 handguns because they come in different frame sizes. We have several .327 revolvers and believe me a 122- or 125-grain bullet at 1,200 fps loaded for the Blackhawk will lock the cylinder on the Charter Arms Kitgun (Patriot).
With the heavy bullets I like Hodgdon Lil Gun
The 122-grain NEI No. 82 ahead of 11.2 grains of Lil Gun will develop 1,164 fps in the 4’ GP100 and 1,230 fps in the 5 ½” Blackhawk. I prefer the stopping power or shock of the heavy .32 caliber bullet compared to the light bullet.
Here is a link to a thread on the Beartooth forum. Post No. 25 compares Hodgdon Lil Gun, H-110 and Alliant 2400. We have been using Alliant 300-MP at the same velocities. 1,200- to 1,300 fps seems to have just about the right energy for the well muscled critters.

https://www.shootersforum.com/handgun-cartridges/47667-327-federal-thread.html

With the .32 H&R Magnum the 87-grain XTP is a pretty good bullet. In the 4” S&W M-16, 5.0 grains of Alliant Unique is an accurate load giving 1,225 fps.

In the 7 ½” Ruger SSX Bisley 9.0-grains of Alliant 2400 will give you about 1,1,75 fps.
I have some pictures of the 100 grain XTP dug out of the dirt after going through a porcupine. The XTP sort of slugs its nose and retains weight pretty well.

I am looking forward to the new Henry .327 rifle. Our Marlin in .32 H&R Magnum is heavy but the weight of the barrel it a good off hand rifle.
The 90-grain Sierra hollow point bullet ahead of 4.4 grains of Alliant Unique will break 1,200 fps with good accuracy in the Marlin. The Sierra bullet holds together well.

The 100-grain Speer JHP is a good bullet in the Marlin. The Marlin has a 20” barrel and that’s why we chose that barrel length for the Henry we have on order. The 100-grain Speer bullet ahead of 4.4 grains of Unique will break 1,200 fps and is a fine bullet for called critters.
We will probably be loading down the .327 Federal to stay under 1,400 fps to limit exit holes and bullets flying across the pasture.

Slim,

Thank you so much for your generous assistance with this. I may have to try to some of the commercial cast bullets as I can't seem to find the time to even cast round balls for the MZ's.

The 100 gr Gold Dot really sounds like a neat little bullet. I have had good luck with GD's in my 9mm so this sounds like a perfect place to start.

My only hang up so far has been my dear little wife wanting to know why my current rifles aren't adequate...Women....

Here are two more threads to look at. I have not contributed to them. The first has a good deal of heavy bullet information.
The second on the SP101 has thoughts on light bullets.

http://singleactions.proboards.com/thread/10428/notes-mag-327-fed-sp101

http://singleactions.proboards.com/thread/17565/ruger-sp101-327-mag

The 115-grain Federal load seems to be accurate in all of our .327’s and while it is a bit much for raccoons, rabbits and skunks it is a good porcupine bullet. This one was shot into the water bag from the 4” Charter Arms.