I'd try Accurate powder. They have loads for all sorts of big cases using 5744 powder. 45-90 is not supported by SAAMI so most powder outfits won't list smokeless loads for it.

 

Bill,

Wayne is making me a 26" 45-90 H&R barrel, I'll be doing QuickLoad predictions for it, if you give me the fired case volume in grains of water, barrel length and bullet you want to use and COL, I can run the numbers for you to give you a starting point.

Here's AA's data, still trapdoor tho and some old published data that I've had for a while.

Tim

http://www.accuratepowder.com/data/...om/data/PerCaliber2Guide/Rifle/ObsoleteCartridges/45 90 Winchester page 363.pdf

 

Wayne is making me a 26" 45-90 H&R barrel,

Ohhhhhhhhhhh! <drool>

 

I fell into that one Richard, called Wayne to see when my 260 Rem barrel would ship, asked me if I wanted a 26" Ultra barrel that had a buggered chamber, said he could rebore and rechamber it to a big bore like 45-70 or bigger, 450NE, 450AK, 50-70, etc for the cost of the rebore, so I thought on it, not wanting to deal with expensive brass and dies, called him back to order the 45-90, should be done in 1-2 months. I would have loved a 9.3x74R, but he doesn't do .366" rebores.....yet, still working on him for that. ;D

Tim

 

a 26" Ultra barrel
450NE, 450AK, 50-70, etc
for the cost of the rebore
order the 45-90

FOR THE LOVE OF HUMANITY!!!!!!!!!!!!! stop!!

9.3x74R

<wimper> <swoon> :'(

 

I think wild west guns 457 is realy 45/90 or close enough for a start

 

I did hear back from Alliant, they say they have no internal data, and provided Lyman 49th for me.

Interesting info about the saami situation, if so, I agree that is the reason for the lack of data.

Quick, I may take you up on that. I need to order some brass, then the reamer. I will probably be using 777 for starters with the cases and eventually get some heavier than 300gr jacketed bullets to play around with smokeless. I do hope that I am still happy with my 45-70 performance after the conversion.

Where is wild west guns 457 data available, new to me. I was hoping Hodgdon would have some thing to add using H4895, since they use this for their youth loads. using this powder as a light load 458winmag would seem to be a candidate that translates to the 45-90.

 

WWG 457 Mag data is available on Hodgdon's website, the WWG case is only 2.2" compared to 2.4" for the 45-90.

Tim

http://data.hodgdon.com/main_menu.asp

http://www.wildwestguns.com/loading.html

 

Hi Guys
I don't post much but this topic is something I've been working on for almost a year.
I took a T/C 45-70 barrel with a muzzle brake and re-chambered to 45-100 Sharps (2.6") new starline brass ,lyman dies, speer 400gr. FNSP bullets and finally settled on a load that launches that bullet at 2268 ( 10 fps standard deviation over 5 rounds) through my chrony with smokeless rifle powder. Very safe load with no signs of excessive pressure anywhere--I figure its around 41,000 psi. The 2.6' starline brass has 8 grains of case capacity over a 458 WM Not enough difference to cause pressure problems. I've fired over 100 rnds with that load now andI'm on my third load per case--- the brass grows very little
The brass is excellent and much cheaper than the Wild West 457 stuff-- all the 457 loads are tailored around the 1895 Marlin lever gun and a 1/10" longer 45-70 case with no room to work the load. The 45-90 case could out perform the 45-70 in a ruger#1 or Encore but the pressure would be above 51,000 to do so . I'm willing to share my loads but only over the phone.
I hate typing. By the way it shoots 1.5 " at one hundred (24"standard contour barrel plus 1.5" brake) Would probably group well at 300 but I can't see that far!!!
Good hunting------ Heavybullets