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Double Rifles, Single Shots & Combinations >> Building Double Rifles & Gunsmithing
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Jager
.224 member


Reged: 10/01/12
Posts: 19
Loc: New South Wales Australia
Re: which action for a 45-70 double rifle conversion ? [Re: Jager]
      #202308 - 12/02/12 08:20 PM

l may of found as good donor gun for my conversion (45-70) or maybe bigger who knows the gun is a Bentley Vaguard 12 g double barrel not sure how to post some pic yet .but it has a round cross bolt it also has the side clips and has bushed strikers and is in great condition l was just wondering if anybody knows anything about this make of shotgun with regards to metal quality etc.

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Birdhunter50
.375 member


Reged: 03/06/07
Posts: 815
Loc: Iowa,U.S.A.
Re: which action for a 45-70 double rifle conversion ? [Re: DarylS]
      #206288 - 01/04/12 02:53 AM

Daryl,
I was going back over some of these posts and found yours about pressure and velocity of some 45/70 rifle loads. Some time back I built a .405 Winchester for a friend and we regulated it with a 300 grain jacketed spire point bullet at 2100 FPS using Varget powder. Not a really hot loading, but crisp. I had initially thought that I wasn't going to like this caliber in a double rifle, but that gun changed my mind very quickly because it seemed that it was out performing any 45/70 loading that I had come up with to date. I realized two things, because it was somewhat smaller in frontal area, and because it was using spire point bullets, it was holding up it's speed much better.
Then I realized that because we can shoot a spire point bullet in our double 45/70's, plus the fact that spire point bullets are now available in the .458 size, there is no reason that the 45/70 couldn't be boosted up to .405 speed in a 45/70, as long as the action is strong enough to take it.
What powder would you recommend using in a good strong 45/70 double to get 325 grain bullets up to 2200 FPS safely? Would varget do it? I have also just bought some Hornady 300 grain Interlock bullets in .411 for the .405 Winchester and some 325 grain Hornady FTX .458 bullets to try in my 45/70's. Any load over 2000 would be fine by me for the 45/70 325 grain loads. I just wonder also if these FTX bullets will reliably open up at 2000 FPS? Bob

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DarylS
.700 member


Reged: 10/08/05
Posts: 27727
Loc: Beautiful British Columbia, Ca...
Re: which action for a 45-70 double rifle conversion ? [Re: Birdhunter50]
      #206303 - 01/04/12 10:22 AM

I have no experience with the 325gr. Hornady. I have heard it is a big soft for really fast loads. I don't know. If it is as heavily jacketed as the 350gr.RN, it should do just fine as that bullet worked well for me on moose.

In an action capable of handling 40,000, I'd probably use somewhere around 54.0gr. H4198 in a .45/70 - which is listed as 39,300CUP. But FIRST, I'd start at around 48.5gr. listed as 32,200CUP at 2,036 fps and work slowly, using a chronograph and watching for any pressure signs, all the way.

With that weight bullet I do not believe the .45/70 case has enough room to produce those higher speeds with slower burning powders,as with the 350gr., compressed 60gr. plus loads are shown at barely over 2,000fps.

Do purchase Hodgdon's Annual Mannual.

It's .405 Win Loads include 400gr. Woodleighs and loading data to 2,400fps for the 300gr. Hornady.

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


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

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