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Hi guys! I have always wanted a 86 in 40-70-330. A friend of our family had one when I was young. I shot it a lot and also cast alot of bullets for it. The mold was a Lyman Ideal #40393 275 gr. HP. Would a mod # 71 action be better or should I stick with an 86? I used to shoot a 450/348 Ackley Imp. in a Mod. 71. It sure was a lot of fun. Wish I never would have let that 71 go. Only lever gun I have is a Win. 95 short rifle in .405. That is one reason I would like to stick with 40 cal. Could anybody help me with load data, or any ideas? I realize that the .405 and the 40-70-330 are not the same bore.
Jack K    
 

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CARTRIDGES OF THE WORLD shows the following loads for the .40-70-330:

25/ IMR4198 - 1,380  f.p.s.

26/IMR4759 -  1,540 f.p.s.

Factory Load - 1,383 f.p.s.  

Hope this helps.
John
             
 

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 John,
       The 40-70 WCF is based on the 45-70 as are most of the '86 cartridges. It is slightly bottlenecked so should be easily formed using 45-70 cases and  the 40-70 sizing die. I have no experience with this one, but I do load the 38-56, which is only a few thousandths smaller in diameter. I use IMR 3031, with 26 grs thi lightast and 36 the heaviest in my 1890 built '86 rifle. This powder works best for me and my gun. These cartridges are quite adequate for most N. American game;all the while understanding their limitatations. I wish you luck in your search for an '86 in 40-70. I think that they are sorta scarce since the cartridge only lasted a few years. You could find a smaller caliber such as the 38-56 with a bad bore and have it re-bored to 40-70. Might be a reasonable way to go. Keep those old boomers at work.
                                                                                                                                   Mike
 
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