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Old 03-13-2010, 07:40 PM
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Join Date: Mar 2010
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.45/70 in /45/90 Winchester

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Greetings. I have an older (1906 in great shape) Win. Mod. 1886 in .45/90. Naturally, ammo delections are a little sparse and I read an credible old magazine article that back in the day many folks shot .45/70 Govt. in the .45/90s. Anyone have any experience or thoughts on the matter? I know it ought to work, like a .38 in a .357 mag, but a little wisdom from other shooters would be comforting.
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Old 03-13-2010, 09:52 PM
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Join Date: Mar 2010
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Found the info I was looking for. Certainly shootable, but not recommended due to increased lead and powder fouling of chamber and probable pressure drop, both of which should degrade accuracy. Weigh against availability and relatively low cost of .45/70 compared to .45/90 and decide for yourself.
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Old 03-14-2010, 09:04 AM
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Join Date: Jul 2003
Location: Republic of Texas
Posts: 779
Keep the chamber clean and shoot them. Also keep in mind that the 45-90 was an "express" cartridge designed to shoot the lighter bullets (for that bore size) at higher speeds, meaning a slower than normal rate of twist. That twist may not do a very good job of handling bullets over 350-400 grains in weight. Every barrel is different, so you won't know until you try.
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Old 03-26-2010, 09:38 AM
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Join Date: Aug 2009
Posts: 18
You mignt try seating the CB out about 2 tenths of an inch and see how that works. It might aleviate some of the lead and powder fouling of the chamber. It might be better to try 1 tenth first. I would also use a nice tight crimp, preferable with a factory crimp die from Lee.
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