Left-Hand Gain Twist

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@Frank Green ,

The biggest hurdle to switching to LH GT is availability, I understand that its a supply and demand issue, but will LH GT become more available any time soon(ish). Are your carbon wraped barrels available LH GT?
 

gnochi

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The biggest hurdle to switching to LH GT is availability, I understand that its a supply and demand issue, but will LH GT become more available any time soon(ish). Are your carbon wraped barrels available LH GT?
Lead time at Bartlein isn’t appreciably longer for LHGT vs anything else. Pretty much nobody else has that as an option, sadly.

Twist, material, and carbon wrap are available in any combination.
 

TreyMeTrey

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My LH-GT was my most accurate rifle.it was 6.5x47..i would probably do it again..i wouldn't recommend LH for bigger cal or magnum..recoil is on stock whip opposite direction meaning..towards your face
So would you say a LH Gain Twist would not be beneficiary in a 6.5 PRC? Or mostly not in a 300 PRC? What a bout just a Gain Twist in a Right Hand Twist?
 

TacticalDillhole

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    So would you say a LH Gain Twist would not be beneficiary in a 6.5 PRC? Or mostly not in a 300 PRC? What a bout just a Gain Twist in a Right Hand Twist?
    There is no reason, not even recoil, why LHGT can’t be used on anything. When I ordered my Hoplite (RIP) I ordered 300NM LHGT.
     
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    TreyMeTrey

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    My LH-GT was my most accurate rifle.it was 6.5x47..i would probably do it again..i wouldn't recommend LH for bigger cal or magnum..recoil is on stock whip opposite direction meaning..towards your face
    So would you not use a LHGT on 300 PRC ? Thanks
     

    TreyMeTrey

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    So would you say a LH Gain Twist would not be beneficiary in a 6.5 PRC? Or mostly not in a 300 PRC? What a bout just a Gain Twist in a Right Hand Twist?

    I use LHGT on everything I can. Even a 300 Norma. No issues.
    Thank you.Im want to build a 300 PRC and put a new barrel on my 6.5 PRC and Ive been reading about LHGT barrels for a couple years,What barrel maker do you suggest? Bartlein?
     

    wjm1000

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    Reached out to Mile High this week about getting a LH Gain twist barrel for 300WM to shoot from 190gr SMK up to 230gr Bergers. Was advised that the recoil of the 230gr Bergers would be hell on my face with the gun recoiling in to me.. lighter shooting calibers it was no big deal... Has anyone experienced this unintended consequence with magnum rifles and LH twist barrels ?
    I shoot a Bartlein LH gain twist 10-9.25-1 twist 408 CheyTac necked down to .338 shooting a 300 grain Berger elite hunter bullet at 3225 FPS. and haven't experienced any noticeable or uncomfortable impact on my face or otherwise and I'm 76 years old.
     

    TreyMeTrey

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    I have used LH gain Twist barrels in almost all my custom buildsfor quite some time.I wanted it to recoil into me versus away from me to be able to control the RECOIL and the TORQUE. I have not noticed any discomfort from any of my LH gain Twist rifles. One is a 300 PRC, another a 7mm Rem. Mag. and a 338 Lapua Magnum. I will be putting a LH Gain Twist Barrel on my 3275 Cheytac when this barrel is gone..I bought trhis rifle.I didnt build it or it would have a LH Gain Twist barrel on it.To me a Gain Twist barrel just is eaxsier on the barrel and myself.
    I read about a LH Gain YTwist Barrel about 1976 and like the idea and used one almost extensively.
     
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    newguy2k3v2

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    Thanks for all the first hands accounts regarding the recoil .
    That makes no sense to me. A typical rh twist barrel spins the bullet clockwise going down the barrel so the reaction to that, if perceptible would torque the rifle into you, if you’re a right handed shooter. A left hand twist would do the opposite.
     

    lowlight

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    That makes no sense to me. A typical rh twist barrel spins the bullet clockwise going down the barrel so the reaction to that, if perceptible would torque the rifle into you, if you’re a right handed shooter. A left hand twist would do the opposite.
    Whatever you say …

    Read Pope …
     

    TacticalDillhole

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    I’m not trying to argue, I’m genuinely curious how that works.

    If actions have an equal and opposite reaction, wouldn’t taking a stationary bullet and launching it down the barrel with a clockwise spin make the rifle recoil back and counterclockwise?
    The torque is in the same direction as the spin. Recoil takes the path of least resistance which in a perfect world would be straight back. It’s not recoil causing that alleged twisting force.
     

    newguy2k3v2

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    The torque is in the same direction as the spin. Recoil takes the path of least resistance which in a perfect world would be straight back. It’s not recoil causing that alleged twisting force.
    Where does it come from?

    Launching the bullet forward pushes the rifle rearward. During firing, if the barrel imparts a clockwise spin, on a bullet that wasn’t spinning before, why does that impart a clockwise torque on the rifle also instead of an opposite reaction like the linear recoil from pushing the bullet forward?
     

    Baron23

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    I’m not trying to argue, I’m genuinely curious how that works.

    If actions have an equal and opposite reaction, wouldn’t taking a stationary bullet and launching it down the barrel with a clockwise spin make the rifle recoil back and counterclockwise?
    Take an electric drill and a short piece of 2x4.

    Set the wood on the bench and don’t secure it in anyway.

    Turn the drill on and press the bit into the wood.

    Observe the direction of spin on both the bit and wood.

    Cheers
     
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    newguy2k3v2

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    Take an electric drill and a short piece of 2x4.

    Set the wood on the bench and don’t secure it in anyway.

    Turn the drill on and press the bit into the wood.

    Observe the direction of spin on both the bit and wood.

    Cheers
    Yes, exactly. Even if you just pull the trigger on the drill, free spinning in the air, it’s going to momentarily torque the opposite direction of the bit rotation.
     

    cas6969

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    That makes no sense to me. A typical rh twist barrel spins the bullet clockwise going down the barrel so the reaction to that, if perceptible would torque the rifle into you, if you’re a right handed shooter. A left hand twist would do the opposite.

    I can understand why you think that and part of my brain wants to think that way as well. But it’s not. Look at it as the bullet spins to the right and wants to take the barrel with it.

    Having had a couple magnum revolvers start to unscrew their barrels through use, I know for a fact this it’s what happens. lol (If it worked the other way, they would have tightened up)
     
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    Baron23

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    Yes, exactly. Even if you just pull the trigger on the drill, free spinning in the air, it’s going to momentarily torque the opposite direction of the bit rotation.
    No. The drill bit has friction w the wood and the wood will spin in the same direction as the bit is rotating.

    It’s not an exact metaphor. I thought I would be illustrative but apparently not.
     

    Baron23

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    I will say this...I have two almost identical 6.5 CM rifles....diff action and barrel manf but same barrel contour and same chassis.

    One is right 7.5 twist Proof M24 and the new one is a Bartlein MTU LGT 8.25-7.5. Both finished at 26".

    To tell the truth, I really don’t notice a diff in my face/hands from the torque applied in one direction or the other....but I am a fairly insensitive lunkhead so take that into consideration.
     
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    BuildingConceptsllc

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    The issue is that simply thinking "equal and opposite reaction" totally ignores the rest of the equation. I'm not going to explain the whole thing but... don't you think the guys that actually shoot these for years and years and live and breath this stuff know what they are talking about? This topic has been covered here many times and the question answered.
     
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    newguy2k3v2

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    I can understand why you think that and part of my brain wants to think that way as well. But it’s not. Look at it as the bullet spins to the right and wants to take the barrel with it.

    Having had a couple magnum revolvers start to unscrew their barrels through use, I know for a fact this it’s what happens. lol (If it worked the other way, they would have tightened up)
    No. The drill bit has friction w the wood and the wood will spin in the same direction as the bit is rotating.

    It’s not an exact metaphor. I thought I would be illustrative but apparently not.
    Ok take the drill comparison and change it to a drill press with your material clamped onto the table.
    The drill press is your receiver and stock/chassis
    The material is your barrel, clamped into the system.
    The drill bit/armature is like the bullet.

    When you turn it on and spin up the bit you get torque on the entire machine to spin it in the opposite direction of bit rotation. You’d see it if it were on a turntable or feel it If it’s light and not bolted down. Once it’s spun up that goes away. When you start drilling the material there is friction but that torque is contained within the system. The only force that would escape the system is torque/inertia from a change in speed of the spinning mass.

    I assume it’s Harry Pope that this comes from? Any particular book I should pick up to read into the theory more?
     

    MarinePMI

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    Ok take the drill comparison and change it to a drill press with your material clamped onto the table.
    The drill press is your receiver and stock/chassis
    The material is your barrel, clamped into the system.
    The drill bit/armature is like the bullet.

    When you turn it on and spin up the bit you get torque on the entire machine to spin it in the opposite direction of bit rotation. You’d see it if it were on a turntable or feel it If it’s light and not bolted down. Once it’s spun up that goes away. When you start drilling the material there is friction but that torque is contained within the system. The only force that would escape the system is torque/inertia from a change in speed of the spinning mass.

    I assume it’s Harry Pope that this comes from? Any particular book I should pick up to read into the theory more?
    He (@lowlight ) is telling you to go read this (if you can even find a copy anymore). Might as well add Naramore to that list too.

    2E849D18-5CFA-43E8-9493-833F9252BF68.jpeg
     

    lowlight

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    What a waste of time

    Don’t like them that just means more for me I have 8 maybe 10 LHGT Barrels, they work better

    If you goal is to argue what the 130gr bullet is gonna do to the 18LBS rifle and how that is gonna feel on your cheek your priorities are fucked and you’re not a shooter

    Just ask Baron, I shot his gun today at 800 hit the tiny plate, he shot it and went over the top, we told him it was him, in the end he agreed when we showed him the error and he corrected it.

    Rear bags matter but people want compromise, we researched this along with Bartlein and we shot and tested, based on the writings from Pope, guess what he was right and I like it.

    They shoot better, reload better and don’t care about bullet weight so please focus on the torque
     

    6.5SH

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    It seems that particular edition is a Wolfe publishing reprint that was made from Pope's personal copy, hence the margin notes. Hopefully that helps those searching.

    It doesn't seem to be currently available but perhaps enough requests may spur a reprint:
     
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    TacticalDillhole

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    It seems that particular edition is a Wolfe publishing reprint that was made from Pope's personal copy, hence the margin notes. Hopefully that helps those searching.

    It doesn't seem to be currently available but perhaps enough requests may spur a reprint:
    eBay is your friend
     
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