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Shooting & Reloading - Mausers, Big Bores and others >> Big Bore Rifles
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tinker
.416 member


Reged: 12/03/05
Posts: 4835
Loc: Nevada
Bullet jump...
      #35780 - 13/08/05 01:47 PM

Shooting the sixteen bore double's been fun.
I'm wondering what might be the rule of thumb about bullet jump.

Can bullet jump contribute to the horizontal spacing between barrel groups?
I'm running pure lead roundball and black powder. It seems like I'm in the right powder charge neighborhood, and the barrels are printing somewhere around three inches apart (not crossing) at fifty yards.



--Tinker

--------------------
--Self-Appointed Colonel, DRSS--



"It IS a dangerous game, and so named for a reason, and you can't play from the keyboard. " --Some Old Texan...

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Maineguide
.275 member


Reged: 09/03/05
Posts: 88
Loc: New Hampshire
Re: Bullet jump... [Re: tinker]
      #35903 - 15/08/05 11:07 PM

I'd try shooting her at 100 yards to see what happens. Then make your decision.

Maineguide

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luv2safari
.400 member


Reged: 09/11/03
Posts: 1408
Loc: United States
Re: Bullet jump... [Re: tinker]
      #36024 - 18/08/05 06:19 AM

Sure does with a SXS...Big and slow will widen groups.

--------------------
Hunt with Class and Classics

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mickey
.416 member


Reged: 05/01/03
Posts: 4647
Loc: Pend Oreille Valley, Idaho
Re: Bullet jump... [Re: luv2safari]
      #36145 - 20/08/05 12:25 AM

If it is 3" apart at 50 it will be more at 100. Is it shooting high to the sights? If it is it needs more speed, probably does anyway. If you are maxed out on your charge try a finer powder if possible.

Need more info.

This should be on the Doubles Forum as I think you will get more responses.

If you want it switched let me know.

--------------------
Lovu Zdar
Mick

A Man of Pleasure, Enterprise, Wit and Spirit Rare Books, Big Game Hunting, English Rifles, Fishing, Explosives, Chauvinism, Insensitivity, Public Drunkenness and Sloth, Champion of Lost and Unpopular Causes.

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tinker
.416 member


Reged: 12/03/05
Posts: 4835
Loc: Nevada
Re: Bullet jump... [Re: mickey]
      #36147 - 20/08/05 01:19 AM

Go ahead and move the thread-

I'm taking it out again in about a half hour.
I've reworked my cup wad die and punch. The first version of cup wad I was running had pretty short walls, the new ones are taller and hopefully this will take care of the odd dropped shots.
I will likely also get the chrono set up today too and we'll have a better idea of what's going on from charge to charge.

The sights on this gun were almost impossible to use.
The rear leaves had .030" wide and not so deep notches, the front blade is big and square. It pretty much obscures what little window the leaves offer. I have another gun from the same era and the front sight was filed to a nice triangular and somewhat pointy shape, this one looks like it's never had any modification from the parts bin.
Really, it's possible the gun was shipped to it's first owner way back when and never completely set up to shoot, I'm guessing he had a nice repeater by the time it got to him and this one just sat in his gun rack till he handed it on to the next owner...

--Tinker

--------------------
--Self-Appointed Colonel, DRSS--



"It IS a dangerous game, and so named for a reason, and you can't play from the keyboard. " --Some Old Texan...

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DarylS
.700 member


Reged: 10/08/05
Posts: 27005
Loc: Beautiful British Columbia, Ca...
Re: Bullet jump... [Re: tinker]
      #36155 - 20/08/05 02:43 AM

Were the sights like the standing and 1st leaf on this sight? If so, they are the very best hunting sights you can use. The front should actually be a bead, as that shape automatically nestles in the bottom of the shallow "V".


--------------------
Daryl


"a gun without hammers is like a Spaniel without ears" King George V

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tinker
.416 member


Reged: 12/03/05
Posts: 4835
Loc: Nevada
Re: Bullet jump... [Re: DarylS]
      #36172 - 20/08/05 08:24 AM

Hey nice rifle there...

The standing rear sight on this rifle is flat across, as are the two flip leaves.
The notches in all three are simply what seem to be hammer strike witness notches. The front sight is a square block on a dovetail. I have rifles with express sights like you have there, the standing main blade being a pronounced 'V' shape like the one you have pictured. I agree with you, that arrangement with a bead type front sight is a wonderful setup.
I have seen new old stock mid nineteenth century multi-blade sights like the one on my gun with the same arrangement of witness strikes as what would seem to be 'starts' for filing the sights to regulation height. I've seen numerous period sights on guns that obviously had been working, running guns where like the blades on your sight had been opened up to some extent either via files or gravers to get them to the proper sight picture for the given range the sight would be used at.
I just think this particular rifle never got it's sights tuned to whomever would have been shooting it.
The breechfaces have no peening from cartridges hitting them, no powder burning at the firing pin slots or on the breechfaces, and it's clear that this gun hasn't had it's metal refinished. The bores are absolutely goregeous, the chambers perfect, the muzzle crowns crisp.
Perhaps tonight I'll photograph some more details of the rifle and post them to this or one of the other threads I've started on it in the past couple of weeks.

I had it and my Tolley out to shoot today, as it went I shot the Tolley quite a bit and only put two cartridges through this gun. The chronograph was on the fritz so I didn't bother working much with sixteen bore black powder double rifle load development today. I have a batch of brass in the works, and I want to do a stock bend before I do much more work at the bench with this gun.


--Tinker

--------------------
--Self-Appointed Colonel, DRSS--



"It IS a dangerous game, and so named for a reason, and you can't play from the keyboard. " --Some Old Texan...

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tinker
.416 member


Reged: 12/03/05
Posts: 4835
Loc: Nevada
Re: Bullet jump... [Re: mickey]
      #36194 - 20/08/05 04:20 PM

Oh, somehow neglected to note-

The gun is hitting low and wide.
I really wanted to have chrono data to post today but neither of the chronos at the ranch would rise up outta thier sleep today to time the doube rifle's roundball loads.
Pity that.

The 4198 loads in the Tolley were nice though.
I think I can pick up the pace with that effort, although I will hesitate till the chrono issue is settled before I move much more on the 500/450 3-1/2" BPE nitro for black loads with that gun. The 325gr remington jshp slugs were cruising out just a little high and a little wide. That was with 52gr 4198, if I go by the standard method of 40% of case volume mass of FFg I should be running 60gr. I just want to see the chrono tape on the work up to that kind of charge. The 52gr load feels and sounds good, a bit more throttle and the groups will converge at the fifty yard target board.
With that rifle I'm just seating to juuust into the cannelure groove, no crimp. That gives me plenty of jump, that rifle spits .458 little 325 grainers, not ounce roundball, the Tolley weighs ten and a half pounds, the sixteen bore double rifle weighs just under seven and a quarter pounds.
Perhaps Sunday will be the day for happy loads in the sixteen bore.


--Tinker

--------------------
--Self-Appointed Colonel, DRSS--



"It IS a dangerous game, and so named for a reason, and you can't play from the keyboard. " --Some Old Texan...

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