Harrington& Richardson Buffalo Classic 45/70

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I have some Hornaday 350 gr. FP interlocks. Is anyone loading these for the Classic? Any recipes? Modern powders please.
 
There's 350 grain data on Hodgdon's site under lever actions. I believe the H&R is strong enough for those loads.
There's an unverified load(as in untested, unknown safety) for your rifle on Reloader's Nest using IMR4350. Wouldn't trust this data myself. Guys says its OAL is 5.26CM(2 5/64"). Hodgdon gives 2.540" OAL for a 350. And he mixes metric and Imperial.
 
There's 350 grain data on Hodgdon's site under lever actions. I believe the H&R is strong enough for those loads.
There's an unverified load(as in untested, unknown safety) for your rifle on Reloader's Nest using IMR4350. Wouldn't trust this data myself. Guys says its OAL is 5.26CM(2 5/64"). Hodgdon gives 2.540" OAL for a 350. And he mixes metric and Imperial.

Thanks sunray I will check out Hogdon. (as in untested, unknown safety) My God. I don't think I have see 4350 mentioned anywhere. That is why I come here. Thanks again gunnutz.
 
Thanks sunray I will check out Hogdon. (as in untested, unknown safety) My God. I don't think I have see 4350 mentioned anywhere. That is why I come here. Thanks again gunnutz.

Just because a load isn't "published" doesn't make it unsafe. Many reloaders never get past the "Novice" stage, clinging to their load manuals and that's ok.

A full case of 4350 and slower powders like 4831 over even a 500 gr bullet cannot produce enough pressure to harm an H&R BC, which is strong enough even for "Ruger #1" levels of pressure.

I've used full cases of both and of BLC-(2) with good effect, but you can't expect top velocities which is why they aren't "published".

A safe 45-70 load can be made up with practically every powder that exists, but powder manufacturers cannot afford to test all, so only test those that they consider "optimum" - a good balance of pressure, MV, and accuracy.
 
Just because a load isn't "published" doesn't make it unsafe. Many reloaders never get past the "Novice" stage, clinging to their load manuals and that's ok.

A full case of 4350 and slower powders like 4831 over even a 500 gr bullet cannot produce enough pressure to harm an H&R BC, which is strong enough even for "Ruger #1" levels of pressure.

I've used full cases of both and of BLC-(2) with good effect, but you can't expect top velocities which is why they aren't "published".

A safe 45-70 load can be made up with practically every powder that exists, but powder manufacturers cannot afford to test all, so only test those that they consider "optimum" - a good balance of pressure, MV, and accuracy.

Thanks for the insight Andy. I was leafing through several manuals I have. I observed that the slower burning powders are never recommended for straight walled cartridges, as soon as a case has a neck or a substantial taper such as the 450 nitro express the slower burning powders appear in the data. I have been thinking about trying black powder in both my classic and an original 86 that my Dad left behind. Some manuals I have are quite old my Dad was rolling his own in the early sixties.
 
The use of the slower powders has nothing to do with cartridge shape, i.e. straight or bottleneck, but with the ratio of cartridge capacity to bore size, aka "Expansion Ratio".
 
Lee lists xmr4350 with a charge of 65 grains for the 350gr J bullet.
I know its not IMR but they are next to each other on the burn chart and i dont think it would be possible to get enough IMR 4350 into the case to cause problems.
That was for the modern lever action.

Take it for what you paid for it :)
 
I think the unverified loads on Reloader's Nest are put in that category due to the ligitigous nature of the U.S. of A. Except that Reloader's Nest is based in Norway.
Anyway, this is the page. Way down the .45-70 main page. Add the W's. .reloadersnest.com/unverified_detail.asp?CaliberID=91&ID=5312
Like Andy says, unpublished doesn't mean unsafe. It usually just means untested. Or not tested at the time of publication.
Lee tests nothing. Their data comes from the powder manufacturer. Not a bad thing.
 
Lee lists xmr4350 with a charge of 65 grains for the 350gr J bullet.
I know its not IMR but they are next to each other on the burn chart and i dont think it would be possible to get enough IMR 4350 into the case to cause problems.
That was for the modern lever action.

Take it for what you paid for it :)

If you look in the same book at data for the 405 gr bullet, it lists IMR4350. Using those loads with a 350 gr bullet would result in the same or lower pressures.
 
I have the same book in front of me. "A-XMR-4350" is shown multiple times on pages 685-691. IMR4350 is on page 90.

There is only 612 pages in this version Copyright 2003 revised 2011 Reprinted 2012, 2013, ha ha ha unreal. And not one mention of 4350 powder in any of the 45-70 data. At any rate I found some Hodgdon 4198 today at accuracy plus in Peterborough they had three or four lb.s on the shelf if any one is interested.
 
There is only 612 pages in this version Copyright 2003 revised 2011 Reprinted 2012, 2013, ha ha ha unreal. And not one mention of 4350 powder in any of the 45-70 data. At any rate I found some Hodgdon 4198 today at accuracy plus in Peterborough they had three or four lb.s on the shelf if any one is interested.

Mine has 719 pages. "Reprinted 2003, 2004", so mine's an early version. It's often a good idea to have old versions kicking around as revisions typically add new powders and drop others. The Lyman Cast Bullet Handbook is a good example. The 4th edition is useful, but I won't give up my 3rd edition.

That said, H4198 is an excellent powder choice for the 45-70. You can go from "powder puff" starting Trapdoor loads, to full house "teeth jarring" "Modern Rifle" loads with one powder.
 
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