Special Interests - Groups & Societies > The Winchester Model 1876

Load Data for the 40/60

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Boone May:
Has anyone tried any of the Jamison .40-60 brass in an original 1876? 
I have some that Buffalo Arms made from .45-70 WW cases and they feed and eject correctly from my original 1876.  That is in spite of the the .45-70 cases having a smaller rim.
These Jamison cases might be a good option too.

dusty texian:
Jamison 40-60 wcf cases have loaded , fired and ejected just fine in my rifles  for yrs.. Very good cases .,,,DT

Slamfire:
 Took the day off and went to the range. Using my 40-60 Chaparral and Lyman 403168 bullets cast at .216gn. .406dia. & Coated. 50yds.

  5rds.- IMR 4198 @ 24.8gns. ---------- Hi. 1416 ------- Low. 1376
  5rds.-IMR 4198  @ 25.8gns. ----------- "   1494--------   "    1456
  5rds.   "     ""     @ 26.8gns. ----------   "  1555 --------   "   1513       

  5rds.-IMR 3031 @ 26.8gns. ----------- Hi. 1438 ---------  "   1388
  5rds.-IMR 3031 @ 28.1gns. w/.4 flr. --- ". 1523 -----------   1492

 With the exception of 2 rds. (by yours truly) all shot to point of aim, the "tightest groupe" was from the IMR-4198 @ 25.8gns, no filler.
 I did not try to change my sights as i wanted to see how each groupe shot as to point of aim.
 The 24.8gns. of IMR-4198 shot the lowest & 26.8gns. opened up, I could live w/ the IMR-3031 @ 28.1 w/4 filler.
 The only problem i have is "astigmatism", floaters in both eyes, look like fuzzy spider webs.

  coffee's ready, Hootmix

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Boone May:
I got hold of some Jamison .40-60 brass so did a comparison with some resized WW 45-70 brass.  The Jamison brass has a slightly larger rim but not quite as big as an original Winchester make .40-60 cartridge in my collection.  Not sure why, maybe they had to make them fit the reproduction guns.
I don't have reloading dies so I use an original Winchester Model 1880 loading tool.  It works great for this.  The fired cases didn't need resizing so after cleaning and de-priming I re-primed them.  I used Winchester large rifle magnum primers.
I found the WW brass must have thinner walls as I can get 60 grains by volume of Goex cartridge in them.  On the other hand, the Jamison cases will only hold 50 grains by volume and still have enough room to seat the bullet with light compression. 
Bullet used was from original Winchester .40-60 mold which drops a 210 grain bullet with two grease grooves.  I didn't resize them, just lubed with SPG and used the loading tool to do the seat and crimp operation.  Just like the boys did in the ranch house back in the day.

dusty texian:
40-60 wcf once fired Jamison case , Winchester LG rifle  primer ,  57 Gr. Swiss ffg by weight = 55 gr. by volume measurement under an original 210 gr. bullet lubed with SPG requires 1/8 " compression to achieve  the correct OAL , seated in Winchester tong tool . This load has given good accuracy and just under 1500 fps in my rifles for well over a decade !!!!! ,,,,,DT

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