Lymans great planes rifle barrel, want more twist.

[Kim Bob]

Muzzle loader novice, I have a very nice Lyman GPR with a 1:60 (ish) twist. I drew a Muzzle loader tag this year for a cow elk in Oregon. I'm thinking a greater twist would be better all around for this hunt.
are 1:48 or 1:24 barrels available?

Thanks all from Oregon

 

[Indy Durtdigger]

The Great Plains Hunter model were available in faster twists. You've got to know if you have an Investarms or the Pedersoli built Signature series. I have my Uncles Investarms with a 1:32 and a kit Pedersoli built one with a 1:48 twist. I've seen 1:24 Hunter model barrels as drop in replacements. Others on here prob have more insight on the Lyman offerings over the years.
Having said that I peruse various sites looking for stuff like this frequently. The GPR stuff can be hard to find. I see more of those pop up on the classifieds here than anywhere else. Short of ordering a custom barrel a second rifle could end up being easier to find than just parts.

 

[Grenadier1758]

@Kim Bob, check your state's hunting requirements for muzzleloading projectiles. The round ball should be adequate for elk up to 100 yards. If you feel you must be using a conical bullet, the Lee Precision REAL bullet in 54 caliber and 300 grains is short enough to stabilize in your 1 in 60 (most likely Investarms) rifle. At $45, the REAL conical bullet is far cheaper than a new barrel and bullet mold.

If you have an Investarms rifle, there are replacement barrels with a faster twist that are interchangeable with your barrel.

 

[Kim Bob]

My rifle is a 50 cal, it is an Investarms rifle I built from a kit back in the day. (mid to late 90's??) sounds like I need to search for investarms.

 

[leadhoarder]

Yeah the great plains hunter GPH barrel will drop in and will shoot a conical or condom wrapped pistol bullet very well.

 

[Grenadier1758]

I think cotton wrapping would work better @leadhoarder.

 

[ETipp]

Muzzle loader novice, I have a very nice Lyman GPR with a 1:60 (ish) twist. I drew a Muzzle loader tag this year for a cow elk in Oregon. I'm thinking a greater twist would be better all around for this hunt.
are 1:48 or 1:24 barrels available?

Thanks all from Oregon

Good luck finding one. I too, have a Lyman GPR that I would like to find a faster twist barrel for, but I have not been successful at finding one. Word is, they are not available. If you happen to find one, please post up.

 

[waksupi]

Round ball will kill elk fine.

 

[deerstalkert]

Kim Bob, what do you have, flintlock or percussion? what caliber, 50 or 54?
might have something that would work for you. will check after a cuppa.
checked. my gpr spare is 1-60
good luck.

 

[Kim Bob]

Precussion, 50

 

[montezuma]

I shot some lee reals that I cast this weekend. 380 grain in my gpr 1 in 48 twist 54 cal. Did really well. Shoots round ball great also. I know it's been said but a roundball does really good on elk. My last elk was at 90 yards and the 54 cal ball passed through and she dropped right there.

 

[Kim Bob]

Kim Bob, what do you have, flintlock or percussion? what caliber, 50 or 54?
might have something that would work for you. will check after a cuppa.
checked. my gpr spare is 1-60
good luck.

mine is 50, percussion.

 

[HSmithTX]

I'd be shooting some of the conicals in the barrel I have now before spending money on another barrel? It might shoot great.

 

[Indy Durtdigger]

I agree with the other guys here. Try a short chunky conical out. Dixie used to sell one called a Ballet that my uncle used in his .54 cal. 1:60 for many a year to take whitetails with.

 

[Uncle Miltie]

You can often overcome a slow rifling twist by increasing velocity, even with bullets. Shoot the projectile you want to use, increase your powder charge by 20% and see how it does.

 

[ETipp]

The Great Plains Hunter model were available in faster twists. You've got to know if you have an Investarms or the Pedersoli built Signature series. I have my Uncles Investarms with a 1:32 and a kit Pedersoli built one with a 1:48 twist. I've seen 1:24 Hunter model barrels as drop in replacements. Others on here prob have more insight on the Lyman offerings over the years.
Having said that I peruse various sites looking for stuff like this frequently. The GPR stuff can be hard to find. I see more of those pop up on the classifieds here than anywhere else. Short of ordering a custom barrel a second rifle could end up being easier to find than just parts.

So which one would the Lyman GPR be, Investarms?

 

[Hermit Tim]

Muzzle loader novice, I have a very nice Lyman GPR with a 1:60 (ish) twist. I drew a Muzzle loader tag this year for a cow elk in Oregon. I'm thinking a greater twist would be better all around for this hunt.
are 1:48 or 1:24 barrels available?

Thanks all from Oregon

You shootin' balls or bullets? That is a round ball twist. If yours is a .54 round ball will work fine if you are ok with that. .50 might work as well depending in range and shot placement.

 

[TreeMan]

Race what you brought to the track! A 50 or 54 caliber with 1:60ish twist with a round ball will kill anything in North America. With a faster twist you’ll lose accuracy with a roundball and need a conical. 1:48 is ok for roundball but faster isn’t. Don’t overthink things. Worry more about shot placement than fiddling with conicals.

 

[longcruise]

So which one would the Lyman GPR be, Investarms?

Yes

 

[ETipp]

Yes

Thank you sir!

So there is a drop in barrel with a faster twist available?