Now my ruger no 1 in caliber 45-90 WCF is ready. I wanted a cartridge with rim, but bigger than 45-70. I tried out some loads for it with Accurate 2230 powder. I bought 1000 brass from Bell ($56/100). The difference between 45-90 and 458 WM in powder space was 5 grains.

My 45-90 show only 2 grains diffence if I use fireforming and necksizing due to a tight chamber. My 458 WM show a difference of 6 grains with fireforming and necksizing. The throut lenght of my 45-90 is allmost the same as in my 458 WM.

I got 2397 fp/s with Swift 400 grain without compression and absolutely no signs of pressure. The primer is round and no other signs of pressure. I reloaded one brass ten times with that load to se how many times I could use my brass and there was no problem at all. I think I can use it for at least ten more.

My goal was not to use it as a 458 WM with 500 grains bullets, but for fun I tried 480 grains Woodleigh SP with Accurate 2520, and I got 2100 fp/s without any signs of pressure.

Later on I gonna to post some picture on it. The 45-70 is very common, and most people trie to push it to hard with very high compressed loads. I thougt that a 45-90 would be perfect for bullets from 300 grain to 405 grain, and without any need of high compressed loads to get 2200 fp/s. I just started below the starting loads for the 458 WM, and I didnt needed to go higher either.

This is now my hunting rifle for elk, pigs and moose.

I had a No 3 in 45-120. It would easily duplicate Lott and Weatherby ballistics.

I've long thought that a 45-90 in a Ruger #1 would be the ultimate cast bullet gun.

I would want mine with the 1:20 twist of the 45-70 and a fairly short throat. This would allow you to seat a 350-400 grain bullet out to the rifling, and the twist rate would not be too rough on a short lead bullet.

The increased case capacity would make it easier to push lead bullets without high pressure.

However, I would want mine with the heavier and longer "tropical" barrel to decrease felt recoil.

If you don't mind me asking, why did you have a long throat cut if you were not planning on using heavy (500+gr) bullets?

Congrats. Neat rifle.

Bob.

My twist rate is 1:18 and the barrel is 26". I bought a reamer for the 45-90 WCF from Clymer and it had that long throut, just like their 45-100 reamer (45x2 6/10) (0.5" freebore lenght). The freebore lenght of 45-90 WCF reamer is 0.4" so if you want a shorter you may buy a reamer for 45-90 Win (0.1" freebore lenght) from Clymer.

My reamer in caliber 45-110 Sharps have a very short throut. Anyway, my rifle in 45-90 WCF shot three bullets 1" at 100 yards, don´t matter if I use 350 grain, 400 grain or 480 grains bullets. With 420 grains lead bullets it holds three bullets 1.5" at 100 yards and 2000 fp/s. I think it can do better when I have tried out what powder wich is best for those lead bullets.