doublegunshop.com - home Forums General Discussion DoubleGun BBS @ doublegunshop.com Chokes for a .410

I've not done the patterning so I only know what I've read.
It's been stated that at Skeet or Quail distances, there is little difference between the patterns thrown by Skeet chokes and full chokes.

Will someone with some real knowledge on this subject please set me straight.

Thanks

From my experiance there is quite a differance.
Skeet choke throws a much wider pattern than full choke.

Pete

these were with my 68 superposed new model skeet 410, supposed to be skeet1 and skeet2. shot at 30 yards.

uggie 410. choked mod/extra full. 25 yds.

I was going to make some persuasive statements about the large differences I've seen between chokes on the pattern board and in the field, but Devrep's pictures pretty much cover it.

I shoot a lot of .410 at upland game and like cylinder bore for the first shot and mod or full for the second shot, for my hilly and brushy quail hunting. I think the distance of increased effectiveness between cylinder and full on a .410 is in the neighborhood of 10-15 yards. YMMV

I read somewhere (probably Roster in SS) that the 3" shell out of a full choke somehow causes a dispersion of the pattern out of sync with the choke differences...Geo

George,
I haven't experienced that to any notable degree. But it seems reasonable in theory, since more percentage of the shot load is in contact with the bore/forcing cone/choke than with a 2 1/2". Shooting a 3" shell in a 2 1/2" chamber would certainly make for a few reactions likely including a pattern effect, among other things.

In actual practice, I've seen a noticeable tightening of the pattern by cutting very long shallow angle forcing cones and polishing them. I attribute this to less damage to the shot.

Thanks for the info.

I measured the nominal bore diameter of a couple of 42's, Winchester and Browning. The Winnies were underbored at .407 and the Browning was truest at .411. Would bore difference affect constriction, i.e. less constriction necessary to achieve desired choke when the barrel is underbored??

I'm not looking to extend the effective range of this gun, I'm just looking for the optimum chokes for Skeet(basically)
but don't want a DT Double to have the same choke in both barrels.

How about .011/.007, LMod/SkeetII ??

The best answer that I have seen to specifically answer your quest as to the optimum choke constrictions for a .410 S x S is somewhere on the web---but I'll be darned if I can find it now. At any rate, the authors of this exhaustive study recommended specific constrictions and loads at all 8 skeet stations. In conclusion, they recommended the ideal constrictions in a S x S should be .009 in the right barrel---that's right, the right barrel and .006 in the left barrel. And choose which barrel to shoot (providing you have a DT or SST gun) first by the presentation--whether it be outgoing or incoming. They assumed 1/2 oz. shot @ 1200 fps and recommended using #9 hard shot.

Here's an additional article, admittedly not as informative as the article I cited above.
http://www.clayshootingusa.com/html/archive/jun_jul11/410%20gauge%20Choices.pdf

I understand the Skeet In / Skeet Out set up but think I'll stick to traditional right barrel more open, left barrel more constricted
just in case the gun ever gets voted off the island.

With a double trigger it will be easy enough to tap the rear trigger first on any of the pairs