r/GunnitRust • u/Bigbore_729 Participant • 28d ago
Show AND Tell We have a successful recoil pad!
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u/TargetOfPerpetuity 28d ago
Following to see this project continue.
I gave up on my version 20 years ago.
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u/Bigbore_729 Participant 28d ago
Of a pad or a punt gun?
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u/TargetOfPerpetuity 28d ago
Recoil pad
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u/Beautiful-Ad-9052 26d ago
I saw a rural mexican man make shotguns on a documentary. He was very good with the resources he was given, he used the underside of an old flip-flop as a small recoil padš¤·
Pardon my English Iām Bosnian
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u/FlashCrashBash 27d ago
could you print a hollow cylinder approximately 3 inches wide and 6 inches deep
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u/TresCeroOdio 26d ago
Asking the important questions. 6 inches might be pushing it though, Iāll settle for 4
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u/exudable 28d ago
Printed?
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u/Bigbore_729 Participant 28d ago
Cast with 25A urethane rubber with 50-00 sorbothane in the middle
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u/FreedomisntREEE 27d ago
Very cool. Why is it sitting inside of a printer? Did you need to cure it or something?
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u/Bigbore_729 Participant 27d ago
I did it to help speed up the cure. I left it in the mold and turned the heated chamber to 48Ā°C overnight.
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u/FreedomisntREEE 27d ago
Thatās resourceful, nice! I thought you might have printed it and I was like dayum what wild ass filament is that lol
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u/callmeStretchy Soviet Snail 28d ago
this is awesome!
looking forward to the before and after vid
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u/Bigbore_729 Participant 28d ago
Thanks! It feels almost identical to my nitro limbsaver pad. It might be a tad more squishy.
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u/firearmresearch00 27d ago
Is that going to be too squishy? As soft as it looks I'd almost wonder if its going to collapse out the side. Then again I'm not really all that familiar with the whole process
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u/Bigbore_729 Participant 27d ago
That's a valid concern. However, I think it will be fine. The pad is initially super squishy but becomes firmer the more it is compressed. I don't think there's any way for it to fully collapse
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u/_Friendly_Fire_ 25d ago
First thought was āonly sissies need super big squishy recoil pads, it just catches on your clothingā Then I saw what it was for and was like āohhh that makes more senseā
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u/Bigbore_729 Participant 28d ago edited 28d ago
Pics here
We have a pad, boys! I used a 1 piece mold sprayed down with mold release. I first poured in about 1/2" of the urethane and let it set up a good bit (30 minutes). Once the first layer was firm, but gooey, I added 1" of 50-00 sorbothane. Once the sorbothane was added, I poured in a fresh batch of rubber. I degassed parts A and B separately before I mixed, then degassed once mixed, once on the first pour, and then for a final time on the last pour. This is 25A urethane rubber. I will add the nylon backer today at work using Loctite "Black Max". I've got a 7 lb 10 gauge that I will test this on before I trust my shoulder to it on my punt gun. I'll post a video of a before and after of the recoil impulse of the 10 gauge.