Possible bug in Version 1.20-3230:

The W1895 7.62x54R barrel adaptation modification works, but then I can't load the rifle with 7.62x54mmR ammunition even though it shows that ammunition type after the modification.



Comment/suggestion:

On a separate but related note, I really like the idea of being able to change the caliber of this gun to help keep it relevant past the early game, but I wonder if it would make sense to keep the starting caliber as the .44 used in the Peacemaker revolver and then allow it to be modified to use the .44 Magnum.

It could fill a much-needed role as a low-recoil rifle for low strength mercs and also provide another gun to use the plentiful .44 ammunition besides the Peacemaker (which is really overshadowed by the other pistols because of the 2 AP cost to ♥♥♥♥ it).

Then it could be modified to use the .44 Magnum for more power as you have it set up in its default configuration. This would be like the jump up from a Peacemaker to an Anaconda and would maintain this gun as a pistol caliber carbine.

Going from a pistol cailber .44 Magnum to a full-power rifle cartridge like the 7.62x54mmR feels like a much bigger change than just upgrading it to take a higher power pistol cartridge. I assume that's why you call it the W1895 barrel adaptation, since that's basically converting it into a whole new gun.

If we think of the Peacemaker as a Colt Frontier in .44-40 Winchester, then that would make this rifle more like a Winchester 1892 in .44-40, which was also made in .44 Magnum in modern times (like the real-life Winchester 1894).