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Rifling and Muzzle Rise

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Old 07-12-2013, 05:18 PM   #21
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Originally Posted by therewolf View Post
OK, let's say you have standard 4-groove rifling. Wouldn't the barrel also

be inclined to twist CCW, because only one groove and land is facing

up at the end of the barrel.
Well, since a properly crowned barrel would actually have each land and grove releasing the bullet on all sides at the same time, the direction of release should be equal on all sides. This is part of what makes the crown an important component to accuracy. Having the bullet lose contact in one area of the muzzle before another would allow gasses to push the bullet in one direction or allow the bullet to come out of the bullet to be tipped and yaw in it's spin and reduce accuracy.

So, idealy you have a concentric bore with a concentric crown an dall forces on the bullet at the time of release is equal on all sides. So this should not be a factor in muzzle rise.
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Old 07-12-2013, 06:24 PM   #22
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Originally Posted by SSGN_Doc View Post
BS. Some guns do have left hand twist, and others have right hand twist, smooth bores have no twist. They all have muzzle climb. Probably more to do with bore height, stock angle/drop at the comb, and physical contact with the gun that drives the muzzle upward.

If no one is holding the gun it goes straight back on recoil zero muzzle rise. That's why artillery and tank cannon go straight back. There is no stock being held below the center line of the bore acting as a lever.

Rifling imparts rotational torque on the firearm either twisting clockwise or counter clockwise depending on direction of twist. Rotational torque is a huge issue on large artillery pieces. You can see it in action on slomo vids of 500sw revolvers being fired
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Last edited by JonM; 07-12-2013 at 06:28 PM.
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Old 07-13-2013, 02:16 AM   #23
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Originally Posted by BillM View Post
I thought it was worth sharing. It does bring to mind one question---
Smoothbore guns (old musket, shotgun), having no rifling twist
would by this theory have neither muzzle rise nor dip.

From my own observation over the years, this doesn't seem to be
the case. Odd.
Bill gravity is gravity,it doesn't matter if it's a rifled or a smooth bore rifle,what goes up must come down...The law of gravity.
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Old 07-13-2013, 01:02 PM   #24
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Originally Posted by trip View Post
Recoil can't be be cancelled. Felt recoil maybe?
Originally Posted by MOshooter View Post
Bill gravity is gravity,it doesn't matter if it's a rifled or a smooth bore rifle,what goes up must come down...The law of gravity.

Yup. Got it--hence the stated skepticism and smiley in my OP.

The person I was quoting however---appeared to be serious. And had a LOT
of posts on that forum. I just found the statement so totally ludicrous that
I felt it was my civic duty to spread it around a bit.
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