forsyth barrel

[Tinker2]

Anyone have a Rice .62 caliber Forsyth barrel with a 1:95 twist that can tell about it?

Anyone shoot one?



Thanks
William Alexander

 

[kruzer1]

Jason at Rice barrels makes them and recommends high powder charges. I have one for a build.

Forsythe rifling is different than most. They do have the advantage of use in shot.

Here is a link explaining the concept:

Link

 

[Loyalist Dave]

Well if you review what I posted, written by Forsyth, plus my reference to his powder loads, he was launching .680 ball with a snug patch, using 110 - 135 grains of powder, for deer. IF you don't have actual Forsyth rifling, meaning shallow grooves and very thin lands... then all you have is a really slow twist barrel.

In his book Forsyth mentions starting out with a 1:120 twist barrel, but found that the 1:104 was optimal for what he wanted to do.

Will a 1:95 work? It should if the other criteria are met, but again if the lands and grooves are equal in width, and the grooves are cut to standard depth... it's just a really slow twist barrel.

LD

 

[Tinker2]

What is the twist on your Rice barrel?
What is marked on it?




Thanks
William Alexander

 

[Tinker2]

So Rice’s Forsyth barrel with a 1:95 twist is not a Forsyth barrel?

Am I the only one with a Rice 1:95 twist?



:idunno:
William Alexander

 

[Tinker2]

Well if you review what I posted, written by Forsyth, plus my reference to his powder loads, he was launching .680 ball with a snug patch, using 110 - 135 grains of powder, for deer. IF you don't have actual Forsyth rifling, meaning shallow grooves and very thin lands... then all you have is a really slow twist barrel.

I did read your post and thank you for posting. It does have what looks to be wide shallow grooves and thin lands (thin but not knife edge)

“In his book Forsyth mentions starting out with a 1:120 twist barrel, but found that the 1:104 was optimal for what he wanted to do.”

If he started out with 1:120 I wonder what he went down to before arriving at 1:104?
He was launching .680 balls with the 1:104 twist, would it be a different twist for a different caliber?


Any and all information, speculation, thoughts, advice are welcome

Thanks
William Alexander

 

[Loyalist Dave]

The photo link, provided in another's reply will give you a good idea if you have the right stuff. I'm not busting your chops, but until you clarified, it could simply have been a barrel somebody labeled as "Forsyth" simply based on a slow twist. Even with the thin lands, the gooves need to be shallow as well.

At the beginning of his book he mentions how a gunsmith set him up with a 1:120 twist barrel. Coincidentally, this was the recommended twist for the Baker rifle in 1804. He then experimented with other twists. His book details the process.

You might just drop down the powder charges to what his were, and see what that does for you.

You should at least be able to reach out 100 yards with the rifle with accuracy sufficient to allow you to hunt.

LD

 

[jamesthomas]

Btw, I wonder how much powder a 34 inch barrel will burn efficiently? If you put too much powder in it will only burn so much before the rest is expelled as "unneeded". This is just a guess but I bet a 34 inch barrel will only burn around 100 to 120grns maybe even less before you hit the wall of diminishing returns. I would think that at least 65grns. of that 185grns. was wasted by burning outside the barrel.

 

[Tinker2]

I did find this on another forum
I don’t have an opinion formed yet.

“Just a bit of a heads up is anyone is interested. We’ve managed to convince Jason Schneider of Rice barrels to start production of Forsyth pattern barrels in .62 cal. He has agreed to commence manufacture once he has 20 firm orders for these barrels. Price for the barrel is expected to be $260.00 and barrel detail is as follows: Cal: .62; length: 31”; shape: octagonal, swamped; width of breech: 1 1/8”; groove width: .200”; land width: .040”; no of grooves; 8; depth of grooves: .005-.006”; rifling twist: 1:95. Max allowable powder charge: 200gr.

Jason had tested one of these barrels previously. This is what he found: “I built a 62.cal with 1-95 twist. The barrel was tapered 1 1/8" to 1" x 34" long. It took 140 gr 2F before accuracy was acceptable. With 160 gr. three round (groups) were touching at 100 yds. The same with 180 gr. and 200 gr. The velosity with the 200 gr charge was just shy of 2000 fps.”

William Alexander

 

[Shifty]

DANG far very impressive,but don't think I could handle it.

 

[Tinker2]

Not sure I would care for that much powder myself.
My .62 smooth bore flintlock deer gun gets 55 grains and it works fine

Looking forward to hearing any firsthand experience with forsyth barrels



William Alexander

 

[smilovich]

I think you should try a looser ball/patch combo with an over powder wad. I have a Pacific Rifle Zephyr .62 cal with 1:104 Forsyth rifling. It shoots well with a .600 ball and .10 patch over a card wad. I can thumb start that combo and shoot it all day. I typically hunt with it at 100-125 gr FF. Recoil is noticeable but not significant. I've loaded it up to 180gr FF just for fun and my 12yr old shot it at rendezvous this year with good results at 75gr. 100 yds or so is about the limit of anything I've tried with it. That ball, patch card wad combo groups pretty well in my rifle no matter what the powder charge. Per the reading materials that came with my Zephyr, a tight patch/ball combo is not necessary with Forsyth Rifling.