Smoothbore shotgun adapters 9mm or 38spl plus cheap 410 slug ideas.

arakboss

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I am going to be purchasing my first break action shotgun soon (filling out 4473 Sunday), in 410ga.

I am planning on purchasing a smooth bore adapter for it from ebay so I can plink with either 9mm or 38spl rounds. For those who have used a smooth bore adapter in either of those calibers what was the accuracy like. How far away could you consistently get pie plate hits?

Also any ideas on cheap ways to hand load slugs for 410 shells?
 
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I own some in many calibers. If they are smooth bore expect keyholeing at any distance. Still good enough for tin cans at fifteen to twenty feet. Rifled ones are different story . Expect handgun like accuracy, two -four inch groups at twenty five Yards. Ether way not bad depending on your intended purpose.
 
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I am going to be purchasing my first break action shotgun soon (filling out 4473 Sunday), in 410ga.

I am planning on purchasing a smooth bore adapter for it from ebay so I can plink with either 9mm or 38spl rounds. For those who have used a smooth bore adapter in either of those calibers what was the accuracy like. How far away could you consistently get pie plate hits?

Also any ideas on cheap ways to hand load slugs for 410 shells?
Regarding cheap ways to hand load slugs for 410; you can re-purpose .303 British brass and create a straight wall cartridge. You need to make a mandrel to expand the brass and straighten it out, I have to face off about 0.005" off the head stamp to get my gun to lock up. Reload like a rifle cartridge, wrap your slug with Mylar to reduce leading. You can also load the same cartridge with shot and as long as you keep pressures down the brass will last forever. I don't think slugs are what I would call "accurate" at distances greater than ten yards.

I will have to look around in my log books for the recipes. I don't know if that is cheap but it is certainly less expensive than buying ready made ammo.

~Whitney
 
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arakboss

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Regarding cheap ways to hand load slugs for 410; you can re-purpose .303 British brass and create a straight wall cartridge. You need to make a mandrel to expand the brass and straighten it out, I have to face off about 0.005" off the head stamp to get my gun to lock up. Reload like a rifle cartridge, wrap your slug with Mylar to reduce leading. You can also load the same cartridge with shot and as long as you keep pressures down the brass will last forever. I don't think slugs are what I would call "accurate" at distances greater than ten yards.

I will have to look around in my log books for the recipes. I don't know if that is cheap but it is certainly less expensive than buying ready made ammo.

~Whitney
Thanks, I thought about fire forming some 303 brass since I have some but then I discovered you could use 444 brass and dies so I think will go that route. I can powdercoat any lead projectiles I use. I was thinking about trying some round ball loads.

If I did use 303 brass, how would I resize them?
 
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arakboss

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Regarding cheap ways to hand load slugs for 410; you can re-purpose .303 British brass and create a straight wall cartridge. You need to make a mandrel to expand the brass and straighten it out, I have to face off about 0.005" off the head stamp to get my gun to lock up. Reload like a rifle cartridge, wrap your slug with Mylar to reduce leading. You can also load the same cartridge with shot and as long as you keep pressures down the brass will last forever. I don't think slugs are what I would call "accurate" at distances greater than ten yards.

I will have to look around in my log books for the recipes. I don't know if that is cheap but it is certainly less expensive than buying ready made ammo.

~Whitney
Do you think I could use the 444 Marlin die to resize the 303 brass?
 
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I only get here a couple times a week sorry for the delay.

I made a resizing die for my .303 brass that fits my press. You could ease the taper out with a long punch and then fire form it. I like to fire form with cream of wheat cereal and light cardboard disks to create separation between the powder and cereal as well as cap the end of the cartridge. I use a drop or two of fingernail polish on the end, make sure it contact the brass all the way around.

Regarding the use of .444 dies to resize .303 I doubt it would be as successful as the aforementioned method; the case dimensions are quite a bit different where the 444 is .1" larger than the 300. Read that as one hundred thousandths. Since you have the dies it might be worth a try. I would be interested in your results. I uploaded the SAAMI cartridge specs for comparison.

~Whitney

303.PNG 444.PNG
 
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A couple of comments:

Cut the rim thinner from the front, not the headstamp side because that can shorten the brass around the primer and if the primer is high because the head is too thin and you shut the action, BANG! NOT fun!

Why bother expanding the .303 in a die when you can load up some cream of wheat (as stated) and just do it that way in the chamber? Admittedly what I was doing was not .303 to .410 but .308 to straight (for .400 cal.) and it worked fine. Just curious why that wouldn't work.

The barrel of the .410 caliber (it is a caliber, not gauge) shotgun is .410". If you have a choke, it will be smaller yet. Do not shoot .410" slugs out of the bore or soon you will have a chokeless barrel or a split or shot off choke (seen both, and no not by me).

ACE up in Alaska make chamber adapters that I really like. Not ebay smooth bore cheap, but rifled and excellent quality and accuracy. Get a Backwoodsman mag or do web search to get his address.
 
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arakboss

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A couple of comments:

Cut the rim thinner from the front, not the headstamp side because that can shorten the brass around the primer and if the primer is high because the head is too thin and you shut the action, BANG! NOT fun!

Why bother expanding the .303 in a die when you can load up some cream of wheat (as stated) and just do it that way in the chamber? Admittedly what I was doing was not .303 to .410 but .308 to straight (for .400 cal.) and it worked fine. Just curious why that wouldn't work.

The barrel of the .410 caliber (it is a caliber, not gauge) shotgun is .410". If you have a choke, it will be smaller yet. Do not shoot .410" slugs out of the bore or soon you will have a chokeless barrel or a split or shot off choke (seen both, and no not by me).

ACE up in Alaska make chamber adapters that I really like. Not ebay smooth bore cheap, but rifled and excellent quality and accuracy. Get a Backwoodsman mag or do web search to get his address.
I was thinking a sizing die would be necessary to resize fire formed 303 brass between reloadings?
 

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