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Discussion Starter #21
Tex, the tool you describe is a skiving tool. It's what prompted me to question if it would work to return rolled crimp hulls back to use, but it won't. Think of it as a cone with sandpaper on it. It skives the hull making the hull thinner at the crimp end so that marginal crimping tools can form a star crimp more easily.

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But I have to correct something else that I repeated that I heard in the video that I referenced. The person in the video mentioned that he uses 20grains of Red Dot under the 7/8 oz slug. That may be so, but it could also be on the high side. Do a 'net search for "7/8 ounce 12ga shot loads with Red Dot" and look for the Alliant powder load data page to come up. That's what you want. Then find the loads with a 7/8 oz payload. There will be many. A 20 grain powder charge will result in (probably) a quite high velocity. That may be what you want, but not my goal. I think I can reduce that powder charge to 16-17 grains and get the reduced recoil load I'm looking for. But that remains to be seen. I needed to mention it before someone used the 20 grain charge and got something they didn't want. Lowering the powder charge can also give a safety margin. Pressure is a friend, but it can also be an enemy if it gets out of hand and 20 grains might be more than we want. I wish I had a pressure barrel but I don't.
 

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The Spin Doctor is a smooth tapered tool to recondition hulls by friction warming them and pressing them to expand the mouth and remove the folded crimp. I just checked and the review says it will allow a roll crimped hull to be reused once or twice.

https://www.ballisticproducts.com/Spin-Doctor-for-large-bore-10ga-to-20ga/productinfo/SPINDOC

The skiving tool is similar but the surface is knurled so it shaves some of the plastic from inside the hull to make a thinner wall at the top to facilitate a folded crimp.

https://www.ballisticproducts.com/Power-Hull-Skiver-10ga-20ga/productinfo/0740011

I had forgotten about the Spin Doctor until Tex mentioned it but I'm pretty sure I bought both of these tools. I'm always looking for an excuse to buy reloading equipment.
 
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Discussion Starter #23
I stand corrected. I'll check it out. Thanks gents! I need to stop assuming I know what someone is talking about. It would lessen the amount of foot in mouth I put myself through. :D
 

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Be very careful loading shotgun shells. Even a change of primers to a different brand can be a problem. I personally load shotshells but only do approved loads with approved primers and wads and specific brands of hulls. Let someone else have a kaboom. Life is short.
 

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Discussion Starter #25
Thanks for the heads up.

Folks, the warning is a good one. Follow what the gent in the video suggests at your own risk and knowing the potential problems. And follow what I'm doing at your own risk as well.

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An update... But first a recap. So far I've converted 2 3/4" 1oz birdshot loads to 7/8 oz 2" birdshot loads for testing. Then I converted the same 2 3/4" shells to .700 oz 15 #4 buckshot loads. I purchased a mess of 2 3/4" virgin primed RIO hulls and made a mess of them into into 2" .700 oz 15 #4 buckshot loads with Red Dot powder. The load data came from the video. The buckshot was from "strings" of buckshot that I cast just the other day and I left in strings as they came from the mold. I didn't start there though, I started with a load using 16 grains and worked my way up incrementally. Since I have no way to check the pressure I stopped at the load suggested by the gent in the video, 20 grains. The 16 grain load clearly was underpowered. The next was better and I saw no reason to stop until reaching 20 grains. I made 30 of them.

Ultimately my goal is to make 2" 7/8 oz Foster slugs, casting my own slugs using a LEE mold. But I'll start low and work my way up and I'll stop if I see any problems. But be aware that the pressures are low in a shotgun and the only problem seen might be the one where the barrel bursts catastrophically. But I'm deliberately using low base hulls in the hope that they might show problems with pressure if I encounter any.

So far I haven't set up the chronograph so I have no velocity data.
 

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Discussion Starter #26
Hopefully the weather will warm up a bit and not be too windy. My slug mould came in yesterday and I want to be able to cast a few hundred slugs. That number will give me plenty to work up a load and experiment with. With lots left over for production.
 

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Discussion Starter #27
I'm so glad I learned to cast the #4 buckshot first. Today was a clear blue sky with no wind. A perfect day for me to cast, so I did. One problem I had was in keeping the mould too hot (maybe) and not allowing the slug enough time to get solid. I was moving pretty fast. Including melting the lead, in slightly less than 1.5hrs I made a hair over 124 slugs. I lost count but that's pretty close 🙂 .

The first to come out of the preheated mould had what I consider to be minor cosmetic lines that look like creases, but I see no reason they can't be used. Then as the mould heated up some more they were perfect. I just need to slow down a bit and allow them to get a bit more solid. I looked at the sprue and they looked solid, but clearly some weren't. Many had the sprue cut off and others had the sprue smeared off if that makes sense.

But everything considered I think that if someone can't cast slugs they should just give up. It was that easy.

Now I need to cast a few hundred more so that I have enough to play with through the winter.
 

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Discussion Starter #28
Experimenting today using a single shot shotgun. Don't try this at home.

I made 2 slug rounds. One was made the same way I made the buckshot loads, with the wad only, but this then had a thimmed down cardboard wad to elevate the slug. The second used a gas seal from the cut off wads, less the shock absorber, and another cardboard wad, yada, yada. The load data I have says to use 20 grains of red dot. I backed it off to 16 grains. The first load went bang as expected and had greatly reduced recoil, again as expected. The second was an eye opener. The recoil was increased as compared to the first one. That tells me that as I expected I'm getting blow-by by not using a gas seal.

Until I set up instrumentation to know what's going on I'm putting this on hold, and since we're getting showers today it's not getting set up today. I have no idea how I'm going to build these slug loads at this time. I might use a gas seal and go to a slower powder to lower the chamber pressure, or stay with red dot to get the velocity and accept the blow-by. I really like low chamber pressures so I favor the use of no gas seal but I had to try it. And yes, the difference between the 2 loads was night and day.
 

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Discussion Starter #29
Further eport on the converted 1oz shells to 7/8 (.875) oz #8 and 15 #4 buckshot (.700 oz loads). I was in the shade today and the fireball was pretty incredible. The steel wasn't moving afterward and I could hear the pings as it was hit. I didn't pace off the range but it was pretty much the limit I would employ it at w/o a choke tube installed and outdoors. I need to revisit this. So much I need to do with it yet.

My choke tubes arrive tomorrow. :D I need to buy some brown (or any color) wrapping paper for patterning.
 
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