Ten gauge.

Here I am doing some load testing


Here's my buddy JT shooting it:

Yeah, I talked to Hubel too. He told me to use 140 grains of R-17 in my ten gauge. Told him that was more recoil than I really wanted to deal with, and I think he told me to grow a pair in a roundabout kind of way. LOL!

Greetings Goodsteel
I do like that scope set up on the 10.
About 29 years We visited a missionary family in Iquitos on the Amazon. He flew into villages and part of his "work" was croc control. If a large one came around he would use a 12 gauge with Winchester slugs. One day flew to a village and the local pastor stated a "large croc" was eating the pigs and got a child. That evening they went out in a 12 foot dugout. Sure enough the big croc came to the light. Turned out to be near 24 feet long. Croc took two slugs at about 3 feet near straight down both in the same spot. Never penetrated or even brock the neck armor scales. Croc swam some turned and was coming back to fight. The pastor and missionary hightailed it out.
I turned up about a month later and took on the project of a reliable croc thumper. That was my intro to round ball in shotguns. I knew RB in muzzle loaders (69's) was a superb penetrator so figured why not in a shotgun.
Discovered through research that RB creates less pressure than a shot column. So I started out with 12 gauge loading info info for shot and have never had any pressure issues. Found the old Ideal manual (reprint) from about 1900 had an article about RB in Africa. Bottom line... RB will out penetrate any Forster slug.
So our solution was standard Winchester game loads. Dump the shot and drop in a .685 RB.
The Winchester load has an "plastic sleeve insert" that gives sufficient compression when exiting a modified barrel. Once we had the RB down here there was never any penetration issues with any croc encountered.
No crocs here in our high altitude desert but I keep a supply handy for any Datsun that might ever need stopped.
Mike in Peru

I got an accurate mold that puts out a 900 grainer. I sent it to Erik at hollow point molds and he fitted it with a hollow base that cast a 750 grainer. Haven't tried the 900 grainers yet. Forgot to mention this was a 12 gauge mold that drops at .733

If I ever get another rifled 12ga, I may have to get a few of those off of you. One reason I had liked the single shot, is using brass cases I was loafing it like a standard rifle cartridge and did not need to worry about being able to feed a shell through the tube. The bullets I had got before reminded me of a very enlarged version of the 22 cal lee Bator bullet. In brass cases, I seat them so that the top grease groove was just inside the case. I don't remember the load, but in my 18" Tracker with the AT collapsible stock that weighed exactly 4 pounds they were miserable to shoot. I kept the stock of that shot gun collapsed and it had a place where it fit perfectly in the passenger door of my pickup. I was out cutting woof one day while still in Alaska and had a stick get stuck in the chain of my saw. Got it out and threw it as, hard as I could over a root wad about 50 foot away. Apparently there was a, black bear behind it and she was not happy about getting hit with the stick. She stood up, laid her ears back, and about this time I dropped the saw and high tailed it to the truck, swung the door open, grabbed the gun, swung and fired from the hip. I hit her right in the upper snout at about 15 feet, exited the bottom of her head, went back in the neck and exited at the tail bone. My wrist hurt for a week, but it dropped her right in her tracks after destroying a lot of her neck and spine.

The most I could ever stand to shoot at paper was 3 rounds, and it produced a group about 3" at 70 yards, which was fine with me.

I actually have. Dad has a RB mold, and although I do not remember the exact size, I do know that it fits perfectly in a standard 1 oz shot cup. I always just cut the crimp on cheap bird/target loads and dropped the ball in. I did try a few in that rifled NEF I had, and I don't recall them shooting any better from that then they did from the smooth bore with modified chokem

That would probably make it a bit more accurate. How well do the barrels align on target at say 80 yards?

Greetings
Shooting RB in a rifled barrel is no different than shooting RB in a 45 colt or any caliber. That RB needs to be over groove diameter or it will not grip.
In my Mossy 12 I run my RB .005 over groove. They seem to grip enough to get a decent spin and will do 4-5 inches at 100 yards with a starting velocity of 1200-1300 fps. I hunt river bottoms so never tried faster speeds. I just do not need it as my longest corn cruncher shot so far is at 33 yards. A near .740 caliber RB at 1200 fps will go through any bean eater east of the big muddy.
And do not forget to lube the RB if it is in contact with the barrel.
Mike in Peru

I don't think a rifled choke tube would work too well unless it was longer then the usual 2" of so that a normal choke tube is. I would think you would need at least 8" of rifling with a twist that slow and a ball that big.

Did the paradox use round ball? I seem to remember pictures of brass cases with long tapering semi round nose bullets that would have had quite a bit more bearing surface than a round ball, even one a little oversize.

www.classicshooting.com/blogs/reading/17656164-notes-on-shooting-the-paradox

The above reference is a nice article at Classic Shooting Company's site. CSC still makes (or at least sells) 740 grain loads for it, though the bullet is not as long in the nose as my faulty memory suggests. These are loaded in modern plastic cases. I suppose an ounce and three quarter bullet would kill a Missouri whitetail well enough, at any velocity higher than a good high school fast ball.

A second check indicates that these are sold under H&H's label.