50-70 accuracy at 200?

[andym79]

Hi guys I am considering building a single shot 50-70.

Does anyone here have experience with the 50-70 at 200 yards? If so what sort of accuracy could you get from it and using what loads?

Thanks

[Bad Ass Wallace]

I have both 50/70 and 50/90 and on a good day I can hold about 4"at 200. I use a 450gn boolit in the 70 with 70gns Wano 2P and a 650gn Creedmoor bullet in the 90 with 105gn Wano 1F. I can verify to the hefty recoil of the 90 is not conducive to accurate target shooting (recoil is equiv to about 3x30.06's at once!).

If you want accuracy, why not consider the smaller BPCR rounds 38/55, 40/50, 40/82 with fast twist barrels. I have a Pedersoli 38/55 with 1:12" ROT that will push a 372gn custom projectile to 1200fps and good accuracy at all ranges. I have pushed mine to 500yds on the rams and it lacks nothing that the big bores can deliver.

[MT Chambers]

The 50/70 shoots with the 50/90 to 200 or so yards but after that give me the "poison slinger".

[John Boy]

Put a Green Mountain 50 caliber barrel on a Remington Rolling Block action, with a vernier rear sight and a globe foresight and you'll have a black powder rifle accurate to 1000yds
Lee 515-450F - 457gr - 70gr FFg powder - 1263fps

http://www.gmriflebarrel.com/classic-straight-octagon/

[John Taylor]

One of the problems with old barrels is the slow twist the 50-70 had. When I had mine the bullets would tumble at 200 yards because of the 1 in 36" twist.I think if you can fine a 1 in 24" ( like the GM barrel) it should do 200 yards easy.

[andym79]

I can get two twists of .510 calibre barrels here Aus. A 1:15" very easily and a 1:20" with a bit more effort!

Would either of those be okay? Is the 1:15" too fast?

Thanks

[John Taylor]

The 1 in 15" is for 50 BMG.

[andym79]

But the 1:20 would work?

[EDG]

You need to find a twist calculator and use the cut and try method to find the optimum twist for a given length of bullet. I think you will find that a 20 inch twist is too fast except for really long bullets.


But the 1:20 would work?