Tighter than standard choke ?

[Hammer1]

Assume modern shotguns and ammunition with lead shot.

As choke constriction tightens, is there a point when something bad happens to the shotgun pattern ?

If a shotgun choke was made with 10% more constriction than the standard for full choke, what would happen to the pattern ?

20% ?

[LONGTOM]

It all depends.
I like to shoot a lot of 3" #4 buck and have two 12ga Winchester 1300s with extra full turkey chokes.
One will throw a nice 14" to 18" pattern and for some reason the other opens up to around 24".
These paterns are at 50yds.
I have droped back to just a full choke in this one and I am getting about the same pattern as the other gun.
Who knows why!

My Browning A5 magnum with a 34" Hastings barrel with a extra full choke will keep a very tight 16" pattern at 60yds.
I have taken quit a few groundhogs and foxes as far as 80yds with this gun.

You can choke a barrel to much where the shot is smashed against each other as it passes through the choke deforming the shot and causing the pattern to open up after leaving the barrel.
I beleave this is the reason my second 1300s pattern opens up with the same choke and load as the first one.
The only real way to say is to pattern different loads through different chokes and see what works best in your gun.

This has been my experence only.
Others may have more insight into this subject than me.


LONGTOM

[mcwoodduck]

I agree with Longtom.
The more you choke and shoot large shot the more you will need to shoot buffered loads to stop the pellets from deforming and vering off due to flat spots.
Other wise you will need to shoot larger loads of smaller shot to do the same thing.
My question back to you is:  What do you want to use it for.
Late season dove when they are flying on O2.  Could work.
Turkey.  Maybe.  Not sure you will get much more out of it.
Deer with buck.  I'd say no.
And at some point you will choke it down to a point you could rupture something.

[Graybeard]

Yes at some point patterns will be blown by too much choke. The only way to know what the point is for sure is to experiment. Smaller shot sizes tend to be more forgiving of tighter chokes than large shot do.

Ya really need to discuss specifics not generalities for us to share more knowledge with you really. Are you wanting to use #4 buckshot, large bird shot smaller birdshot or what? For what intended purpose?