I emailed Henry to ask what twist rates they use for various calibers, mostly because I was wondering what they used in the lever actions but also what they will probably use in their new single shot. Here is the reply:
Thanks for the inquiry. The twist rates are as follows:

.357/.44/.45: 1/38

.30-30: 1/12

.223: 1/12

I'm not convinced the twists on the .357 and .45 are correct, I've never heard of anybody using that slow of a twist for those. But I do see that they use the same 1 in 38 that Marlin uses for the .44 Magnum.

WTFO.

I emailed them about the 223 and they replied that it has a 1-9" twist.

I was told the same.

Otherwise, I wouldn't have reserved one....

cabelas says 1:9

http://www.cabelas.com/product/HENRY-LONG-RANGE-LEVER-ACTION-RIFLES/2287076.uts

bobs says 1:10

https://www.bobsnorfolk.com/henry-long-range-remington-inch-round-barrel-blue-finish-p-61186.html

gunbroker ad 1:10

http://www.gunbroker.com/item/618403471


able guns says 1:9
https://www.ableammo.com/catalog/he...nut-stock-blued-finish-rds-p-147684.html

You know, how f'ng difficult is it for a Manufacturer to put twist rates on their website?

It won't be difficult for me to hand it back if it has a 12 twist, that's for damn sure...

Got a new reply today.
.357 Magnum is 1 in 16
.223 is 1 in 9.