Novice question re 45-90

[parkinsonsd]

Just curious if you could shoot a 45-70 out of a 45-90, like a .38 out of a .357, and if so, what kind of effect is there on accuracy.

[Cottonwood]

It has been known to be done.  But regretably you will ring the chamber if you do and have a build up of fouling.

I had thought about this myself before and thought well why can't the bullets just be seated out to meet the rifling?

Having asked this before myself and getting this same answer about ringing the chamber I decided to just by my Starline Brass and not look back.  :lol:

[parkinsonsd]

What is ringing the chamber?  This is new to me, I'm sorry.

[John Traveler]

Parkinsonsd,

"Ringing the chamber" is damage to the chamber of a gun barrel, particularly a large-caliber BP barrel, caused by partial chamber obstruction or a cartridge case too short for the chamber.

The resulting bulged ring in the chamber causes difficult extraction when using full-length cases.

In the case of partial bore obstructions, that is most likely to happen from using dacron fluff or fiber or cardboard wads in smokeless powder loads in bottle-necked calibers smaller than .45, although documentd in larger calibers exist.  The NRA Technical Advisor strictly recommends against using any synthetic filler material in smokeless powder loads for that reason.

In the case of black powder loads, extensive firing using shorter brass (.45-70 in a .45-90 chamber) causes erosion of the chamber/throat area and subsequent firing residue accumulation becomes a partial bore obstruction.  Both can be avoided with diligent cleaning.

HTH
John

[parkinsonsd]

Thanks for the information, gentlemen.  I appreciate your responses and will act accordingly.

Parker.