45-70 vs 45-90

[condor]

Would it be possible to safely shoot a 45-70 in a 45-90?? I already own a Pedersoli 1874 Sharps in 45-70, but wondered if I could run the ammo in a 90 without messing things up??

[Dynamic]

I dont think it can really hurt, wont be too good on accuracy. Since this is a rimmed cartridge it " should " headspace.

The only thing i can see wrong is maybe nicking the bullet when it fires off the " dead space " from the case being shorter.

Probably the same effect of shooting 38 special off a 357 mag

[TRAP55]

Won't hurt anything, but accuracy will be less than stellar.
Two things working against that, the freebore jump the bullet has to make, and bullet weight vs barrel twist. I don't know what Pedersoli uses for twist, but the 45/70 originally had a faster twist rate than the 45/90 because it used a longer heavier bullet. A 45/70 with a bullet weight of 300 to 350 grns would work, but I don't know if you could seat the bullet out far enough to overcome the the freebore.

[condor]

Thanks for the replys. Basically what I was thinking just wanted to get a second opinion...

[Paul_R]

You'll get a crud ring in the chamber that will make it impossible to chamber a 45-90 cartridge until it gets cleaned out.

[steamerjames]

I tried it once and all the bullets tumbled. 1-36 inch twist is
Too slow to spin even a 300 grain.

[condor]

I tried it once and all the bullets tumbled. 1-36 inch twist is
Too slow to spin even a 300 grain.

1:18 is what I've found, and with the longer 28", 32" and 34" target bbls it should be enough to stabilize.

I guess the best thing to do is pick up some 45-90 brass and load up some 535 grain with 1 1/2 swiss. I have everything else that's needed...

[TRAP55]

1:18 is what I've found, and with the longer 28", 32" and 34" target bbls it should be enough to stabilize.

I guess the best thing to do is pick up some 45-90 brass and load up some 535 grain with 1 1/2 swiss. I have everything else that's needed...

I would use TrailBoss instead of the Swiss, precisely what Hodgdon made it for.

[condor]

I would use TrailBoss instead of the Swiss, precisely what Hodgdon made it for.

Interesting stuff, and might give it a try on the 375 H&H. I don't see any load data in the PDF for the 45-70 but it should work for a smokeless load. Right now I have a lot of Swiss...

http://www.imrpowder.com/PDF/Trail-Boss-data.pdf

[Paul_R]

Interesting stuff, and might give it a try on the 375 H&H. I don't see any load data in the PDF for the 45-70 but it should work for a smokeless load. Right now I have a lot of Swiss...

http://www.imrpowder.com/PDF/Trail-Boss-data.pdf

You load it just like BP, just fill the case completely but don't compress it.

[TRAP55]

This ^^^
Hodgdon gives a max load of 13grns for 45/70, specifically for Trapdoors. 19grns for the lever guns. It's pretty much idiot proof, especially in a smokeless made Pedersoli. You just can't cram enough powder in the case for an overload.
After using BP in my .32/40 Hiwall, and having to clean it afterwards, I tried the TrailBoss and never looked back.
Don't use it with jacketed or gas checked cast bullets, things can get left in the bore. It makes a great subsonic, no recoil load, for other chamberings as well. I've used it with a 125grn cast spitzer in the 7.62x54r and 7.62x69. Makes the SKS a single shot bolt action, and quieter than a .22 HV round.

[otteray]

SR 4759, ACC 5744 give low pressure spike loads, arguably less a spike than BP or Trailboss.; safe in all of my late 1800s blackpowder cartridge long guns.
That said, my shooting champion, smarty pants know it all brother in Michigan loves Trailboss in his old handguns.

[Spyder]

9.0 of trailboss with any 165-200 grain bullet makes a fantastic no recoil pleasant to the ears subsonic 308 round!