My new 20 bore mold

[johnly]

I would have prefered ~800 grains, but I guess 1040 grains will have to do...

http://i233.photobucket.com/albums/ee13/johnly1923/MVC-012L-2.jpg

800 fps in a 1/24 twist barrel ought to stablize it according to my calculatons.

John

[357maximum]

You need to make a jig to drill a hole in it on an angle.






It can whistle on the way in that way.[smilie=l:

[NSP64]

OUCH!!!! Post pics of targets. Are you using all-brass or plastic hulls?

[johnly]

Plastic for now, but will go to brass when all is said and done.

John

[copdills]

keep us informed on this slug , this is new to me and yes lets see some target pics Please

[Catshooter]

johnly,

I am going to start up a loading project for my Handi-Rifle. I have both rifled & smoothbore 20 bore tubes for it.

I want to load up some lighter ones for a single round ball, and some heavies for two round balls. Got some starting load ideas?


Cat

[Greg5278]

Fisrt see how much weight you will have for a double ball load. Then you can look up shot data in the Lyman or BPI manulas, and substitute the balls. They have some fast 1600FPS loads for a 345gr slug in the one Lyman manual. I don't know how fast you can push a double ball load.
That should give you a starting point. 3 balls will be much harder, because you will start to run out of space in the hull for powder.
Greg

[Catshooter]

Thanks Greg for the data. The 20 gauge ball should weigh about 350 grains. We'll see. This'll be interesting.


Cat

[shotman]

Be sure you check the ball in the tube first. If it has to swage much your pressure is going to sky rocket. Would stay with a slow burn powder Blue dot or Unique

[Greg5278]

I can't remember the number of the mold. but lyman makes a conical that coul be used in a 20ga wad. The number starts with 548, and is for oversized .54 cal muzzleloaders. In a hollow point version, it should work well. The RB in you rifled bores might not work in hotter loads. They often stripped for me in faster 12ga loads.
Greg

[nitro450exp]

Greg

What is the band diameter and the groove diameter on that Slug ?
Why were you hoping for 800 and got 1040 ? (25% error seems excessive)
Couldn't the mold maker tell how much the slug was going to weigh ?
Once you tell me the the diameters I may have to get a couple from you if they will fit.

Very cool.

Cheers Nitro

[johnly]

Nitro...

I purchased the mold, didn't design it, hence the difference in desired weight.

It drops .622" from the mold.

John

[nitro450exp]

Johnly

Sorry got you and Greg mixed up.
0.622" might work for me, I may have to buy a few from you to try in my DR when it is done.

Thanks
Nitro

[Greg5278]

The Layman mold is supposed to drop at .548" in Pure lead. In WW it should be another .0015" or so larger. The mold number is 548-657 and is a 450gr Whitworth style bullet.
Greg

[Catshooter]

john,

How are you going to get a crimp using the brass shotshell/that honking boolit?

I'm wondering how to crimp my round ball is why I ask. Thanks.


Cat

[johnly]

It's a single shot and the slugs are a friction fit into the case.

John

[Buckshot]

...............If it's a base pour mould you could have the bottom band and lube groove flycut off the blocks to lighten it up. That 1040gr slug is a bit over 2 & 1/3rd ounce!

................Buckshot

[Arisaka99]

Catshooter, what brand chokes do you use, I have an NEF pardner 20ga also with a 3in chamber and a mod choke, but I'd like to buy some more barrels. In the near future I am planning on buying the Rifled bull barrel for 20ga slugs.
Also, does anyone know where to buy 20ga buckshot?

[Andy Griffith]

Catshooter, what brand chokes do you use, I have an NEF pardner 20ga also with a 3in chamber and a mod choke, but I'd like to buy some more barrels. In the near future I am planning on buying the Rifled bull barrel for 20ga slugs.

Well, all you have to do is send back the receiver to NEF and they will fit a new barrel to the receiver. However, the receiver that comes on the gun you mention will not accept the rifled bull barrel, just the lightweight rifled barrel. I'd suggest just buying the bull barreled gun as any other way to put the package together would cost more.


Also, does anyone know where to buy 20ga buckshot?

Do you mean loaded shells, or just the shot? 20ga usually takes #3 buckshot or sometimes #2 buck, in which case both of those shot sizes are available from several places, one of which is ballistic products IIRC. Also, it is possible to cast you own with moulds.

Getting back to that 20 slug- oh my...
I like it!!! :-)

[BCall]

Well, all you have to do is send back the receiver to NEF and they will fit a new barrel to the receiver. However, the receiver that comes on the gun you mention will not accept the rifled bull barrel, just the lightweight rifled barrel. I'd suggest just buying the bull barreled gun as any other way to put the package together would cost more.





A 20 gauge bull barrel will fit a standard frame, only the 12 gauge bull barrel needs the larger frame. You could have the 20 gauge barrel fitted, but it is almost a cheap to buy the whole gun.

[Arisaka99]

Andy, I am talking about loaded shells, but I want to get a Lee Load All for my 20ga's (I have two) and loading some buck and also some rock salt loads.

[Catshooter]

Ariska,

We're using an NEF rifled 20 gauge barrel. Heavy barrel.

I've kinda hit a wall with this devopement. My brother really wants a two ball load. We have Lyman's .605 & .662. He'd like one of each.

My problem is powder, which one and how much? We're talking pretty close to a two ounce payload here by the time it's all said and done. I really don't want him to get hurt.

I thought of using a rifle powder like AA 2230. I'm using brass shells in a rifled bore. With this kind of weight I figured I should be a lot slower than normal shotgun powders. If we can get 800 to 1000 fps he'll be delighted. I just want him to keep both eyes.


Cat

[johnly]

I would have prefered ~800 grains, but I guess 1040 grains will have to do...

http://i233.photobucket.com/albums/ee13/johnly1923/MVC-012L-2.jpg

800 fps in a 1/24 twist barrel ought to stablize it according to my calculatons.

John

Well I took the 20 bore out to the range over the weekend and launched a few of these down range.

3" plastic Fiocchi hull, 2 x 5/8" fiber wads, and an Alcan PGS over 35, 40, 50, 60, & 70 grains of IMR 7283. One of each, as the recoil can be well... something that is a bit more that a light tap. All 5 shots fell into a 4" group at 50 yards, and clearly punched big round holes in the target, so they were above the stabilization velocity. Don't know how far beyond 70 grains I'll go, but I suspect that my shoulder will give out before the rifle becomes stressed.

John

[trk]

What is your as-cast diameter? with ? alloy

[Catshooter]

John,

Did you chrongraph them?


Cat

[johnly]

What is your as-cast diameter? with ? alloy

They drop at .622" using 20:1

John

[johnly]

John,

Did you chrongraph them?


Cat

My PACT died last year I haven't got around to replacing it. Just one of of the many things to do on my list.

John

[johnly]

I fired 3 with 80 grains of IMR 7383 and 3 with 90 grains at the range today. The 80 grain loads were nasty with a sand bag behind the butt, and the 90 grain load with two bags was far still from pleasant.

It looks like I need the barrel ported to even get the recoil down to a reasonable level. The plastic hulls still had tight primer pockets and seemed no worse for wear.

The lighter bullets seem to shoot better, and are not as punishing.

John