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Double Rifles, Single Shots & Combinations >> Double Rifles
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k80
.333 member


Reged: 07/05/04
Posts: 314
Loc: San Antonio ,Texas, U.S.A.
point of cross
      #18081 - 17/08/04 11:35 AM

Am I looking at this wrong? I am
working on a soft recoil round in
my Kreighoff double in 375 H&H.
Branes 210 with 75 grns.of Reloader
15 at 50 yds. The right shoots left
and the left is right. It shoots a
6 shot group in a 2 inch box. I dont
care which barrels shoots,it is the
group I want. This is a 50 yard load,
nothing more.
Ken
San Antonio


--------------------
Ken
San Antonio

Welcome to South Texas

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mickey
.416 member


Reged: 05/01/03
Posts: 4647
Loc: Pend Oreille Valley, Idaho
Re: point of cross [Re: k80]
      #18084 - 17/08/04 12:48 PM

What is the question?

--------------------
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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500grains
.416 member


Reged: 16/02/04
Posts: 4732
Loc: Salt Lake City, Utah USA
Re: point of cross [Re: k80]
      #18085 - 17/08/04 01:01 PM

Your barrels are crossing because the velocity is too high. I am guessing that you need to go down by 5 to 8 grains of powder to get the barrels to converge.

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André
.333 member


Reged: 28/06/04
Posts: 254
Loc: Brussels (Belgium)
Re: point of cross [Re: 500grains]
      #18093 - 17/08/04 06:08 PM

Correct. It has to do with barrel time. A slower load exits the bbl. later and will make the bbls. shoot more apart (the opposite is also true, as you already experienced).

--------------------
André
---------------------------------
3 shots do not make a group, they show a point of aim or impact.
5 shots are a group.

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Marrakai
.416 member


Reged: 09/01/03
Posts: 3482
Loc: Darwin, Top End of Australia
Re: point of cross [Re: k80]
      #18096 - 17/08/04 07:48 PM

k80:
If your current load is tossing six shots into a 2-inch group at 50 yards with open sights, then you don't really have much to worry about! To fine-tune it, try a grain or two either way and see what happens, some doubles simply don't follow the rules.

--------------------
Marrakai
When the bull drops, the bullshit stops!
--------------------------------
www.marrakai-adventure.com.au

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bonanza
.400 member


Reged: 17/05/04
Posts: 2335
Loc: South Carolina
Re: point of cross [Re: Marrakai]
      #18111 - 17/08/04 11:10 PM

My .375 H&H double does not follow the cross rule. I shoots more like a single. POI goes up and group diverges the hotter the load. I can usally put the group (2") whereever I like. I try to print it 1.5" high at 50Yards.

--------------------


"Speak Precisely" G. Gordon Liddy.

"Life is absurd, chaotic and we must define its purpose with our actions" Abert Camus

"I''m the dude playing a dude disguised as another dude."

"Yo! Mr. White"

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new_guy
Sponsor


Reged: 10/08/04
Posts: 581
Loc: Texas
Re: point of cross [Re: bonanza]
      #18116 - 18/08/04 02:35 AM

bonanza - i'm expecting my .375 H&H double in a couple of weeks. It's been regulated with Kynoch 300gr Woodleighs, but i'm looking for a STARTING load to duplicate.

if you have any - will you send me your load info?

Thanks,

--------------------
www.heymUSA.com

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bonanza
.400 member


Reged: 17/05/04
Posts: 2335
Loc: South Carolina
Re: point of cross [Re: new_guy]
      #18119 - 18/08/04 05:10 AM

New Guy,

Here is what regulates for me:

1. Siera 235 H4350 81.5 grains
2. Barnes 270 TSX H414 75.0 grains
3. Barnes 300 TSX Load not found yet
4. Wodlgh 350 PP H414 69.5 grains

Comments:
Load 1 and 2 are much reduced. Low pressure loads.

I have not found a load for my 300 grain
bullent that matches the factory Federal.
I'm sure it will be between 75 and 78 grains
of H414 as the 270 load is perfect.

Load 4 is near max.

I like H414 a lot. Its very compact so you never have to compress it. It also produces the least pressure for a given velocity. I tryed IMR4350 and did not like it one bit. To hot. H4350 is good for the lighter bullets.

In conclusion: check your reloading manual first, but starting a few grains below these loads are a good place to start.

BTW, is this your first double, and what is it?


--------------------


"Speak Precisely" G. Gordon Liddy.

"Life is absurd, chaotic and we must define its purpose with our actions" Abert Camus

"I''m the dude playing a dude disguised as another dude."

"Yo! Mr. White"

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