Wad Spin

[smoothshooter]

In reference to the earlier discussion about wad spin, I am skeptical. What would cause the wad to start to spin in the first place, and how would you be able to tell if it was? Has anyone marked wads with an index mark or something and used high speed photography to see if the wads exit the muzzle with the index mark in a different place than where it started? I think that most people get the idea that wads spin travelling down the bore because they see them spinning after they come out of the bore (I am referring to plastic shot cups here, since they are by far the most visible). I always figured they spun because one or more of the petals on the shot cup come out of the bore twisted slightly and causes a propeller effect. Would appreciate any test info anyone has on the subject.

 

[roundball]

In reference to the earlier discussion about wad spin, I am skeptical. What would cause the wad to start to spin in the first place, and how would you be able to tell if it was? Has anyone marked wads with an index mark or something and used high speed photography to see if the wads exit the muzzle with the index mark in a different place than where it started? I think that most people get the idea that wads spin travelling down the bore because they see them spinning after they come out of the bore (I am referring to plastic shot cups here, since they are by far the most visible). I always figured they spun because one or more of the petals on the shot cup come out of the bore twisted slightly and causes a propeller effect. Would appreciate any test info anyone has on the subject.

Wads can start spinning just because of the reaction of the payload at setback time following ignition...slightest little bit of off balance as the load settles during set-back time will allow the pressure to start rotating it.

It's a well known situation and modern trap and skeet barrels can be bought that have 4 straight grooves running their full length to lock the wads in a fixed track as they are traveling up the bore.

 

[bpbrs]

It's a well known situation and modern trap and skeet barrels can be bought that have 4 straight grooves running their full length to lock the wads in a fixed track as they are traveling up the bore.

I started shooting trap in 1978, skeet around 1983, sporting clays in the early 90's.
I have owned a variety of modern smoothbores , tubed ,ported, backbored, screw in chokes, fixed , adjustable chokes & forcing cones removed. I would venture I have shot about every gun that shows up at the clubs. To add up to a few hundred thousand shotshells out of my own toys alone.
I've even see choke tubes designed to hold back the wad to make a wider patter, spreader tubes.
I've seen rifled choke tubes for smoothbore slug guns.
I work with a fella who is the east coast distributor of Beretta,Rizzini,Perazzi and more.
I personally know one of the top trap competitors in the U.S. and know his Kriegoff bores are as smooth as a baby's bottom.

I have never seen a rifled bore as described above, much less discussed wad spin inside the barrel.

I must have missed that variable along the trail.

My question is, who manufactures such a barrel?

Bill

 

[Leatherbark]

Hastings makes a shotgun barrel with straight rifling. to keep wads from spinnging...........A muzzleloading enthusiast such as I accept my frontstuffers for what they are and dont worry about wads spinning.. I am ecstatic if it goes off LOL................Bob

 

[paulvallandigham]

I believe that Briley offered either full barrels or straight rifled tubes to stop the wad spin. Perazzi was the Italian maker that was the subject of the article I read years ago in Gun Digest.

 

[roundball]

You're right, you sure missed it...it's been an available option for at least 15 years that I'm aware of and I'd bet a lot longer...for example, you can buy Briley tube sets with the straight rifling, you can send in tube sets and/or barrels and have the grooves added, etc.