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Bulseyetom
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40-70 SS fixed load coming along
Jan 12th, 2020 at 8:33pm
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I have previously shot just black in my Hepburn with a fairly new barrel chambered for the 40-70 SS.  I have been working with smokeless the last few weeks and haven't tried but Shooter's Buffalo Rifle so far but it showed good promise so I removed my hunting front sight and put on a Lyman 17 while I fine tune everything.  The rear sight is just a Marble tang sight.  I shot this 5 shot group at 50 yards in windy conditions (my flag tails were almost always straight out so I could not judge velocity very good) with a 300 grain LFN gc bullet sized .412.  I am awaiting an MVA Soule sight with a Hadley Disc so I can see the sights better.  I have been working at 50 yards as I can see the bull much better with the Marble sight at that range compared to 100 and without windage adjustments I would have too shim under one side of the base at 100 yards probably.  This fixed load has me excited to see what I can do breech seated with the 400 grain bullet that works so good with black as soon as I can build a push type seater.  Always fun to shoot an accurate rifle!   Grin  Tom
  
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Just Jim
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Re: 40-70 SS fixed load coming along
Reply #1 - Jan 12th, 2020 at 9:42pm
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I do really like the .40-70 SS and find it pleasant to shoot. I've never shot anything but black in mine, and don't intend to change. But I'm looking forward to doing some work to get it shooting a bit better. 

I DO NOT like the Elephant powder, but at the time, that was all I could get anywhere, and I had to buy a case at that. I now have a wee bit of Swiss and some others to work with. I'll be clearing out my 100 yard range in the next few weeks, and will definately be warming up the Ballard along with my Maynards and others. Fun times ahead!  Wink

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Bulseyetom
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Re: 40-70 SS fixed load coming along
Reply #2 - Jan 12th, 2020 at 9:58pm
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I got pretty good groups with a 400 grain bullet with a duplex load of 5 grains of Re-7 and Swiss 1 1/2 with just a tad of compression.  I had a hunting front sight so not sure how good the load shot but it was 5 shots in 2" at 100 yards with the flat post held at 6 o'clock best my eyes could see.  Tom
  
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marlinguy
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Re: 40-70 SS fixed load coming along
Reply #3 - Jan 13th, 2020 at 12:17pm
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Jim, I bet your Ballard is Marlin's version of the .40-70SS in .40-63 Everlasting, and the thin cased .40-70 Ballard. Unless it's a modern reproduction from Ballard Rifle Co.?
  

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Re: 40-70 SS fixed load coming along
Reply #4 - Jan 13th, 2020 at 2:33pm
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Just curious what you are using in your black powder .40-70 loads?  Any card wads, poly wads, fibre wads, grease cookie?  Still need to do some fine tuning on loads for my Ballard Pacific in .40-90 ...
  

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Re: 40-70 SS fixed load coming along
Reply #5 - Jan 13th, 2020 at 2:57pm
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It will easily do the same breech seated at 100 yds and you might be abit overly surprised on how well it will do at 200 using smokeless.
  

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Just Jim
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Re: 40-70 SS fixed load coming along
Reply #6 - Jan 14th, 2020 at 12:07am
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marlinguy wrote on Jan 13th, 2020 at 12:17pm:
Jim, I bet your Ballard is Marlin's version of the .40-70SS in .40-63 Everlasting, and the thin cased .40-70 Ballard. Unless it's a modern reproduction from Ballard Rifle Co.?


Yes, forgive me for not mentioning. Cody Ballard No. 5 Pacific. At the time, was using the hunting tang sight and blade front. Later added a long-range Baldwin Soule rear and a home-made globe front, but soon went back to the hunting sights. 

A lovely rifle, and I selected the caliber as I thought it pretty close to the .40-63. Looking forward to enjoying it soon!  Smiley
  
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Re: 40-70 SS fixed load coming along
Reply #7 - Jan 14th, 2020 at 12:26am
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Reverend Al wrote on Jan 13th, 2020 at 2:33pm:
Just curious what you are using in your black powder .40-70 loads?  Any card wads, poly wads, fibre wads, grease cookie?  Still need to do some fine tuning on loads for my Ballard Pacific in .40-90 ...


Don't know if that was directed to me or Bulseyetom, but I nearly always use a card wad, although I vary between tablet backing or thin milk carton. Varying amounts of compression, but that seldom seemed to improve things. I generally used a very long drop tube of about 30 inches. 

Almost always employ a grease cookie, because I was shooting in the arid southwest, and the fouling caked terribly hard. The goal was decent grouping without needing to clean between shots for at least five rounds. If using the cookie, I wipe off the base of the bullet carefully, and use a single disk of waxed paper in an attempt to keep the cookie from sticking to the bullet. 

One thing that always mystified me was that the grease cookies could often be found on the ground ahead of the muzzle, in almost unchanged condition. How could this be? And this with SPG or other fairly soft lube, having endured the pressure and heat of firing, and frequently in hot conditions. I even experimented with only a wax paper "wad" or very thin layer of beeswax between the cookie and the propellant, but the little grease wads could still be recovered. My desire was that the lube be vaporized and mixed with the fouling to keep it softer in the bore, but I never managed to achieve that. 

Puzzling...
  
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Re: 40-70 SS fixed load coming along
Reply #8 - Jan 14th, 2020 at 3:29am
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This started out to be about a smokeless fixed load.  What is the smokeless load?
  
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Re: 40-70 SS fixed load coming along
Reply #9 - Jan 14th, 2020 at 6:59am
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Nice shooting Tom.
  
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Re: 40-70 SS fixed load coming along
Reply #10 - Jan 14th, 2020 at 9:36am
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Tom,
Nice starting group, how many grains of Buffalo Rifle are you loading with?  I have some on order to try, folks were telling me it compares to the MP5744 of old?   
Greg
  

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marlinguy
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Re: 40-70 SS fixed load coming along
Reply #11 - Jan 14th, 2020 at 11:25am
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I came into some modern brass marked .40-70 Sharps. It dropped right into several of my original .40-63 Ballard rifles. It's pretty much identical from what I see of specs for both.
  

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Re: 40-70 SS fixed load coming along
Reply #12 - Jan 14th, 2020 at 2:20pm
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I was shooting 27 grains of Buffalo Rifle with both a 300 gr gc and a 325 gr gc lead bullet.  The 325 shot almost as good.  There is a little bit of unburned powder in the bore.  All cases extracted easily from the Hepburn.  When I use black I have been using a duplex load with 5 gr of Re-7 and the rest of the case to the base of the bullet with Swiss 1 1/2, then a 0.030 polywad and compressed maybe 1/16".  Tom
  
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Re: 40-70 SS fixed load coming along
Reply #13 - Jan 14th, 2020 at 2:38pm
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Just Jim wrote on Jan 14th, 2020 at 12:26am:

One thing that always mystified me was that the grease cookies could often be found on the ground ahead of the muzzle, in almost unchanged condition. How could this be? And this with SPG or other fairly soft lube, having endured the pressure and heat of firing, and frequently in hot conditions. I even experimented with only a wax paper "wad" or very thin layer of beeswax between the cookie and the propellant, but the little grease wads could still be recovered. My desire was that the lube be vaporized and mixed with the fouling to keep it softer in the bore, but I never managed to achieve that. 

Puzzling...


Not really.  Even though the powder burn gets quite hot, the contact time is extremely short, so the cookie doesn't have the time to melt/vaporize.  Also, it is protected by a wad between it and the powder. And do check the card wad - not even flame marks on it.  If card won't burn, why should lube melt?
And in the barrel, where could it go - it essentially is a liquid, incompressible, between overpowder wad and the bullet.  The only part of the cookie that performs a useful function is the outer edge, in contact with the bore.  So for a more efficient cookie, you will need a thicker one - more contact surface with the bore.
  
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Re: 40-70 SS fixed load coming along
Reply #14 - Jan 14th, 2020 at 11:25pm
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Thanks Tom.  I have a Ballard I'm trying to finish in that caliber, hoping to be shooting it soon  Grin
Greg
  

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