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[ARCHIVED THREAD] - Springfield Trapdoor reloading?

Posted: 5/28/2023 5:50:00 PM EDT

I'm finally getting around to reloading for my Trapdoor.

Any suggestions? Which powders do you use, BP or Smokeless powder?

I'm useing a Lee 459 dia 405 grain bullet mold.

Posted: 5/28/2023 6:25:41 PM EDT

[#1]

TRAILBOSS

Posted: 5/28/2023 7:59:36 PM EDT

[#2]

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Quoted:
TRAILBOSS

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Thanks, I'll give it a try.

I have a few books that list several powders for the old Trapdoors, but I'm not sure about smokeless.

Posted: 5/28/2023 9:56:41 PM EDT

[#3]

I've used Unique and Accurate 5744.

Posted: 5/29/2023 6:53:40 AM EDT

[#4]

I use 2400.

I get NO unburnt powder and the cases come out so spankin' clean I don't even bother to tumble them.

I use 21.5 grains under a 405 and get right about 1250 fps.

Now that said, the trapdoor rifle (not the carbine) was sighted for a 500gr RN at a similar velocity. The trajectory must be different, as the 405s don't shoot anywhere near to POA for me.

Posted: 5/29/2023 7:31:59 AM EDT

[#5]

Slug the barrel. Bore diameters vary. You may need to upsize your bullet.
I use only Holy Black.

Posted: 5/29/2023 8:30:34 AM EDT

[#6]

Thank you gents, I appreciate the information.

Posted: 5/29/2023 12:23:26 PM EDT

[#7]

Good luck with Trail Boss sourcing.

Posted: 5/29/2023 7:09:54 PM EDT

[#8]

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Quoted:
Good luck with Trail Boss sourcing.

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Yeah, I know. Not a lot of powders coming in around here. That's why I was asking about other smokeless powders being safe for a trapdoor.

Posted: 6/1/2023 3:34:35 PM EDT

[#9]

Ive been loading IMR 4198 with powder coated 405gr hollow base bullets on mine.

I dont remember the charge weight off the top of my head, but I was running under the max for some soft shooting loads. I have had no problems and its great to shoot. I dont know how accurate it is, but that is on the list to check.

Posted: 6/1/2023 6:39:10 PM EDT

[#10]

Quote History

Quoted:
Ive been loading IMR 4198 with powder coated 405gr hollow base bullets on mine.

I dont remember the charge weight off the top of my head, but I was running under the max for some soft shooting loads. I have had no problems and its great to shoot. I dont know how accurate it is, but that is on the list to check.

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Thank you.

I don't care too much about accuracy, I plan on using it as a fun Independence Day blaster.

Posted: 6/1/2023 7:11:32 PM EDT

[#11]

Attached File

From an early '70's Lyman book. Pre-lawyer/ dumbasses blowing themselves up pushing it.
HTH

Posted: 6/2/2023 8:24:09 PM EDT

[#12]

Quote History

Quoted:
https://www.ar15.com/media/mediaFiles/20821/IMG_4796_jpeg-2836985.JPG
From an early '70's Lyman book. Pre-lawyer/ dumbasses blowing themselves up pushing it.
HTH

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Thanks man!

Just picked up a Marlin Trapper since I had the Hybrid 46 in the safe. I have 1 can of trailboss but looks like it may have been made in the plant that burned down. Its my go to for subs of all calibers. I have a lot of casting stuff so may want to cast with some of the Lyman molds I have. I have a lot of 2400, 4227, RL7 and need to find some Unique. I also have a stack of trap doors I can load for.

Posted: 6/4/2023 8:16:48 PM EDT

[#13]

Pure lead cast 405 grain bullet covered in lube sitting on top of up to 70 grains of Swiss Fg or 1.5Fg is what I usually shoot. You can adjust the charge to be lighter for plinking, just add cornmeal as a filler.

Real black powder makes a better 4th of July boom than smokeless, btw.

Posted: 6/4/2023 9:15:57 PM EDT

[#14]

Quote History

Quoted:
Pure lead cast 405 grain bullet covered in lube sitting on top of up to 70 grains of Swiss Fg or 1.5Fg is what I usually shoot. You can adjust the charge to be lighter for plinking, just add cornmeal as a filler.

Real black powder makes a better 4th of July boom than smokeless, btw.

View Quote

I believe you are 100% historically accurate Sir. BP it shall be.

Thanks all for helping. I'll play with a few smokeless choices, but shoot BP for the holidays.

Posted: 6/4/2023 10:40:44 PM EDT

[#15]

Quote History

Quoted:
I believe you are 100% historically accurate Sir. BP it shall be.

Thanks all for helping. I'll play with a few smokeless choices, but shoot BP for the holidays.

View Quote View All Quotes

View All Quotes

Quote History

Quoted:

Quoted:
Pure lead cast 405 grain bullet covered in lube sitting on top of up to 70 grains of Swiss Fg or 1.5Fg is what I usually shoot. You can adjust the charge to be lighter for plinking, just add cornmeal as a filler.

Real black powder makes a better 4th of July boom than smokeless, btw.

I believe you are 100% historically accurate Sir. BP it shall be.

Thanks all for helping. I'll play with a few smokeless choices, but shoot BP for the holidays.

And another fellow shooter helped by the reloading Forum.

Well done guys.

Posted: 6/9/2023 8:07:03 PM EDT

[#16]

I don’t like Trailboss and use 3031 instead.

Posted: 6/9/2023 9:12:13 PM EDT

[#17]

Quote History

Quoted:
Slug the barrel. Bore diameters vary. You may need to upsize your bullet.
I use only Holy Black.

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I have measured bore up to 462I think they made them large for the BP they were useing
Use a soft lead bullet that will bump up to the larger bore size with black

Posted: 6/18/2023 11:25:36 PM EDT

[#18]

Quote History

Quoted:
Pure lead cast 405 grain bullet covered in lube sitting on top of up to 70 grains of Swiss Fg or 1.5Fg is what I usually shoot. You can adjust the charge to be lighter for plinking, just add cornmeal as a filler.

Real black powder makes a better 4th of July boom than smokeless, btw.

View Quote

which drop tube are you using for black powder?

[ARCHIVED THREAD] - Springfield Trapdoor reloading?

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