I am doing some research on the strength of a tight and clean Remington # 2 action.
The rifle is currently in 32 Rim Fire with a bad bore
The customer wants it relined and converted to a center fire

The calibers I am presenting to him are

32 S&W long    15,000 psi
32-20 WCF       16,000 psi
32 H&R Mag     21,000 psi

The members thoughts on this

WCF

You might also consider 38 special.  JES rebored a rifle like yours for a friend of mine and he loves it. 
More cost effective than a liner.

The same action was used for the army and navy pistol in 50 caliber. The brass was only 1/2" long so it could not have had much powder. The action was designed for the black powder cartridges up to 44 so you could go with just about any black powder pistol cartridge. The 25-20 or 32-20 would be great. While it may hold up with 38-40 or 44-40 the bolt thrust may be a bit much if they were loaded with smokeless powder. The original 44-40 pressure was 11,000 psi. The 38 Special was designed to be reloaded with smokeless or black powder with a pressure of 17,000 but if someone were to use a +P load it may be to much for the #2.
A while back I someone sent in a Steven 44 in 25-20 that someone thought would work as a 25-35. The breach block broke so it was replaced and the second one broke also. Please don't push the #2 above what it was designed for.

I reworked a Win Low Wall a couple of years ago from 32 RF to 38 Spl.
But I stamped the caliber 38 Long Colt as that was a  factory chambering
What a hoot to shoot, the customer just loves it.

Talked more to the customer with the Rem #2

He has a bunch of 22 Magnum and 22 WRF ammo
Also a lot of 32 S&W Long ammo which he reloads for

He will decide which caliber once he sees my work quote

WCF

oneatatime wrote yesterday at 12:59pm:


It's usually referred to as bolt thrust. The pressure times the area of the brass in front of the rim. Many of the lower pressure cartridges the brass will cling to the chamber wall and not have much bolt thrust but you can't rely on this because sometime there is a head separation of the brass. I had a head separation on a 50 BMG that was not a reload so it can happen with new ammo.