Winchester 1885 50-90 Sharps

[Three Bears]

Anyone have any information on loads using Unique for “Modern “ Winchester 1885 50-90 Sharps?

[marlinman93]

I love Unique, but I wouldn't use it in a .50-90 myself.

[Three Bears]

I use 15grains of it in my 45-70 CVA. Also just read a post with a picture of an antique can of unique that recommended loads on the label… one was 17 grains 45-70. How much difference in size and using better steel is the modern Winchester 1885 50-90?

[M-Tecs]

https://www.go2gbo.com/threads/need-...s-data.237426/

Information from the Lyman 46th Edition:

Cast bullet (sized to .512" diameter) #515141 422gr. (#2 alloy) 3.030" OAL

Powder start load velocity MAX load velocity
Unique 13.0* 1062 20.0* 1386
SR-4759 21.0* 1062 30.0* 1434
IMR-4227 21.8* 1130 31.2* 1468
IMR-4198 23.5* 1069 36.3* 1460
IMR-3031 26.6* 944 43.0* 1394
FFg 58.5 1097 90.0+ 1440
PyrodexCTG 40.3 1052 62.0 1422

Duplex Load
SR-4759 4.9 1179 7.5 1455
FFg 44.1* 67.5+

IMPORTANT: * Designates the use of a 1/2 gr. Dacron wad, 5/8" square x 1/4" thick over the powder.
+ Designates a compressed powder charge.
italics Designates potentially most accurate loads.


Cast bullet (sized to .512" diameter) #515142 498gr. (#2 alloy) 2.972" OAL

Powder start load velocity MAX load velocity
Unique 12.4* 1002 19.0* 1247
SR-4759 20.5* 1012 27.5* 1288
IMR-4227 20.0* 1005 28.5* 1323
IMR-4198 22.4* 1006 32.0* 1315
IMR-3031 29.5* 1013 40.0* 1299
FFg 59.0 1031 79.0+ 1302
PyrodexCTG 43.7 1007 58.3 1306

Duplex Load
SR-4759 4.5 1044 7.1 1349
FFg 40.5* 63.9+

IMPORTANT: * Designates the use of a 1/2 gr. Dacron wad, 5/8" square x 1/4" thick over the powder.
+ Designates a compressed powder charge.
italics Designates potentially most accurate loads.

[Hiwall55]

I got one a long time ago,wouldn't shoot great till I had the barrel set back and rechambered, smokeless load,33 grains of 5744, 620 grain Creedmoor bullet cast with a BACO mold, work great to 700 yards.

[HARRYMPOPE]

I love Unique, but I wouldn't use it in a .50-90 myself.

I loaded for one and 16g unique shot very well.
My friend that had it passed and i didn't get a chance to buy the gun from the estate

[Three Bears]

Thanks for the information and replies.

[shutinlead]

I got one a long time ago,wouldn't shoot great till I had the barrel set back and rechambered, smokeless load,33 grains of 5744, 620 grain Creedmoor bullet cast with a BACO mold, work great to 700 yards.

HW,
What twist are you using?
I built one in a '74 from a casting, used a GM barrel in 1:24 and struggled with it using black, finally switched to that exact load _- bullet and powder. Very comfortable and accurate to 1000 yds. Recently bought the 710 gr mold from Baco hoping to make this my mile gun. Plan to do some load development next month.
Greg

[Hiwall55]

Hi GT. Mine has a badger barrel in 1-26 twist. My mile load is PP ,670 grain with 32 grains of 5744. Could send you some bullets if you want to try them.

[shutinlead]

HW,
Interesting, I made a swaging die that makes a dual diameter core and did paper patch also. The last batch I tried weighed in at 645 (the die has quite a range of adjustment) and it didn't work that well with black. I haven't tried it with smokeless yet, what are you patching it to for diameter? Are you sizing the case? or patching it to fit the unsized case?
Greg

[Hiwall55]

Bullet is. 504, Patching to.513, neck sizing the case with FL die backed out,just szing 3/4 inch of the neck ,Xpander, seat the bullet, brass is annealed.