Martini-Henry Rifiling Question

[3Beavers]

I have a traditional style half stock muzzleloader (.45/percussion)
It was built by a gunsmith using a Martini-Henry Barrel,
My question is what is the rate of twist in these barrels?

Thanks,

 

[green]

1 turn in 22".

 

[vagrantviking]

I'm sure that Green is right but if you want to verify for yourself all it takes is a tape measure, marker, cleaning rod and some tight patches.

 

[3Beavers]

Thanks green.

vagrantviking mabye you could walk me through the process,
it would be good to know.

 

[vagrantviking]

Two slightly different methods from a previous thread.

pdg300:

Use a cleaning rod with a bearing handle and a tight patch. Mark the rod with masking tape near the handle and slowly push the rod throught the barrel, counting the number of turns the rod makes. With the lengh of barrel and number of turns determine the twist.

Grizzlypeg:

Push the rod in. Mark the rod at the muzzle, pull it out until it completes one rotation and mark it again. Measure the distance between the two marks, that is the number of inches for one twist. I've found a cotton barrel mop holds the riflings well and allows the twist to be accurately measured.

 

[3Beavers]

Thanks a lot