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Very Hot Topic (More than 25 Replies) Rolling Block Buffalo Carbine (Read 6940 times)
sureshot
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Re: Rolling Block Buffalo Carbine
Reply #30 - Dec 15th, 2021 at 8:57pm
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Definitely has a sideplate.
The relic in the picture with the revolver is an 1866, but the one the guy is holding is not.

Steve   Smiley
  
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MrTipUp
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Re: Rolling Block Buffalo Carbine
Reply #31 - Dec 15th, 2021 at 9:34pm
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Look at the side plates and the gun's scale.  The rifle in the photo is a Model 1873 (and not a Model 1876).

Bill Lawrence
  
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Nimrod
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Re: Rolling Block Buffalo Carbine
Reply #32 - Dec 17th, 2021 at 8:34am
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Back to the original carbine in question, the original had a .50 cal bent barrel. I sent it off to be rebarrelled in .50-90 (or .50-2 1/2). I am expecting it back before Christmas. At any rate, I felt like the old saddle.ring carbine action deserved another shot at life.
  

If you need more than one shot, you need more practice!
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Schuetzendave
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Re: Rolling Block Buffalo Carbine
Reply #33 - Dec 17th, 2021 at 9:19am
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For your new barrel you may wish to select the correct length bullet for your new barrel twist.

Here are the gyroscopic stability factors (Don Miller Sg formula) for 50 caliber bullets for each barrel twist:

Bullet                    Weight        Length      1:36      1:34      1:32      1:30      1:28      1:26      1:24      1:22      1:20
                                    Grains Inches                                                      
BACO JIM512450           480      0.970      1.80      2.01      2.27      2.59      2.97      3.44      4.04      4.81      5.82
BACO JIM511500 FN      500      1.010      1.69      1.89      2.13      2.43      2.79      3.23      3.79      4.51      5.46
BACO JIM512515           540      1.100      1.46      1.63      1.84      2.10      2.41      2.79      3.28      3.90      4.72
BACO JIM511600 FN      600      1.220      1.22      1.37      1.55      1.76      2.02      2.34      2.75      3.27      3.96
BACO JIM511650 FN      650      1.300      1.11      1.25      1.41      1.61      1.84      2.14      2.51      2.99      3.61
BACO JIM511670M1 Money      670      1.515      0.75      0.84      0.95      1.08      1.24      1.44      1.69      2.02      2.44
BACO JIM511695C1 Creedmore 695      1.450      0.88      0.99      1.12      1.27      1.46      1.69      1.98      2.36      2.86

You need enough spin to stabilize a bullet so need an Sg of at least 1.4 but 1.5 is preferred.
Bullets overspin after an Sg of 2.0 but long range shooters select bullets up to 2.4 to overspin bullets to compensate for drag over a 1,000 yards.
Excessive overspinning is believed to affect accuracy.

Do not discard the bent barrel.
It can be straightened by a good barrel maker and someone may wish to have an original barrel.
« Last Edit: Dec 17th, 2021 at 9:38am by Schuetzendave »  
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Schuetzendave
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Re: Rolling Block Buffalo Carbine
Reply #34 - Dec 17th, 2021 at 5:33pm
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I put a .50-70 RKS barrel with a 1:34 twist 30" octagon barrel on a color case hardened NYS Rolling Block using the original stock.
It has a CPA Remington Hepburn Walker forearm installed.

She is fitted for a MVA Buffalo Soule Sight and has 17" spaced scope blocks for a 28" MVA scope.

I had a custom 477 grain .512" bullet made for the rifle.

Post pictures of your newly barreled rifle when she comes home.
« Last Edit: Dec 17th, 2021 at 5:52pm by Schuetzendave »  
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Nimrod
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Re: Rolling Block Buffalo Carbine
Reply #35 - Dec 18th, 2021 at 12:53pm
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Very nice rifle, Dave!
  

If you need more than one shot, you need more practice!
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Nimrod
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Re: Rolling Block Buffalo Carbine
Reply #36 - Dec 18th, 2021 at 1:18pm
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This is my first Rolling Block Silhouette rifle. Originally a NYS .43 Spanish. Had it re-barreled with a .40 caliber BRC Choked barrel, chambered for .40-65. Added the rear tang sight (from private stock) and have a MVA front globe on order. It also has a three leaf express sight.
  

If you need more than one shot, you need more practice!
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Schuetzendave
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Re: Rolling Block Buffalo Carbine
Reply #37 - Dec 18th, 2021 at 2:32pm
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Yours still looks original. Looks good.

The .43 Spanish had an extractor for a .640" rim.

Where did you find a narrower extractor for a NYS for the .608" rim of your new .40-65?
« Last Edit: Dec 18th, 2021 at 3:00pm by Schuetzendave »  
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Re: Rolling Block Buffalo Carbine
Reply #38 - Dec 18th, 2021 at 3:13pm
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I sent it to a gunsmith in Washington to have all the work done on it. He is the one who modified the extractor. It works with the three dummy cartridges I have for it, but I have not tried it with live ammunition, yet. I am waiting until I take it to Curt Hardcastle to have trigger work done. The 10# plus trigger pull it has now is just a bit much for a target rifle! Sad
  

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Schuetzendave
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Re: Rolling Block Buffalo Carbine
Reply #39 - Dec 18th, 2021 at 5:28pm
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With the split trigger on the NYS you cannot replace the trigger spring with lighter piano wire spring.

I tried to make piano wire springs for the split trigger but it resulted in too much trigger creep.

To lighten mine I made new flat trigger springs from hack saw blades and still had to angle back the sear and reharden it.
The middle is an original spring - and I narrowed the roughed out springs until I found a pull that was acceptable.

The NYS receiver is different than the other No. 1 Rolling Blocks.
« Last Edit: Dec 18th, 2021 at 5:34pm by Schuetzendave »  
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Re: Rolling Block Buffalo Carbine
Reply #40 - Dec 18th, 2021 at 6:55pm
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Curt Hardcastle in Sliver City, NM does a trigger job on Rolling  Blocks that brings the trigger pull down to  between 2 & 3 pounds. That is plenty good for me.
  

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Schuetzendave
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Re: Rolling Block Buffalo Carbine
Reply #41 - Dec 18th, 2021 at 8:53pm
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Has he ever done a NYS Rolling Block?

Their split overlapping trigger is quite a bit different than the majority of Rolling Blocks with one piece triggers.
  
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Re: Rolling Block Buffalo Carbine
Reply #42 - Dec 19th, 2021 at 7:55am
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Dave, thank you so much for the posts on Jerry Potts and Bella Twin.
  
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Re: Rolling Block Buffalo Carbine
Reply #43 - Dec 19th, 2021 at 11:56am
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I'm sure Curt can get your trigger to a great trigger pull.  He does meticulous work, some of the best in the business.  When it leaves his shop, it will be right.

You can replace the trigger spring with a piano wire spring on a NY contract action, though.  This came up a few months ago, people insisted it wouldn't work, so I made one for George Babbits and sent it to him to prove it could be done.  I think it only took me one prototype and one working spring before I got it to work.  It had a bit of creep to it, not too bad.  I could eventually figure out how to make the spring non-progressive, and to work on the split sear uniformly, to remove that creep, but for as few of these actions as there are out there, I doubt I'll ever mess with it.  I have a few of these actions, and a rifle built on one, I used a wire spring in mine 20 years ago when I built it.  I took it apart after I made the spring for George, and I had done it a different way; didn't even remember I had put a spring in it.   

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Re: Rolling Block Buffalo Carbine
Reply #44 - Dec 19th, 2021 at 5:16pm
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The spring Dave made for my NY 50-70 carbine made all the difference in the world.  After what the original trigger pull was, I'm don't much worry about a little creep.   I'm not even sure there was much creep after I put the spring in.

George
  
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