cartridge chamber units

[Nicodemus38]

am wondering on the existence of converter units that allow for the use of 45 colt ammunition in a 45-70 single shot rifle.

am considering a trapdoor springfield in the future, and woult like to know a chamber adaptor exists.

 

[Mike 56]

Give these guys a call i believe they can make one for you.
http://www.mcace.com/index.htm

 

[dwave]

Just want to add that it if one does exists, you might run into accuracy issues or leading if you use lead bullets. Most .45 Colt ammo uses a .451 or .452 bullet but the .45-70 uses a .458.

 

[Jim Watson]

Even an oldstyle .454" .45 Colt would not shoot well in a Trapdoor whose barrels are more often over .458" than at or under the nominal groove diameter.

Don't fall into the Internet Trap of buying big and shooting small.
The .45-70 is a well known round and you can make it run right.
Intimate details are in The Book:
http://www.the45-70book.com/The-Book-3rd-Edition-by-Spence-Pat-Wolf