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Modelo Poly 43R Prep/Reloading Help
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this post was submitted on 23 Nov 2025
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The man himself! Thank you for the info, I'll give the Torx a try and I'm glad the headspace is intentional. How are the other caliber Modelos coming along? I'm looking forward to building the .38 spl version after the 43R.
38 special is going well. The armorer is testing it and hasn't really had any problems. 327 magnum has proven to be a handful. I don't regret choosing the 327 fed chamber, but likely we will recommend people go with the 32 h&r magnum chamber in stead. 32 h&r still used magnum powders, so you can really utilize the rifle length barrels. It is a very capable round, and the slight shorter chamber will play nicer with 32 long, 32 short, and 32 auto. I really like shooting the 32 longs out of mine more than anything. No problems other than the hotter 327 loads hurting the brass. The gun holds fine but the brass is wrecked with the hotter 327 loads.
Appreciate the update. I'm assuming that .357 mag isn't recommended if the hot .327 are causing trouble?
357 is not going to fare well long term with the current design. Everything should be good to go for 38 special, even using +P loads.
I have a couple of ideas to reinforce the action, but printing the hammer and breech in CF nylon may be all it takes. I will get around to it eventually.
As expected, the optional steel safety plates do not reinforce the action. I have tried them on the 327 with no change in results.
Sounds good, .38spl is very pleasant to shoot and cheaper anyway haha.
I'd be interested in the reinforcement ideas. The hammer looks like it could be cast out of a metal like Zamak. The breech might be too complex but I bet there is a way to cast it too, maybe in parts, then cleaned up using jigs like 80% frames/lowers. SCS inserts for contact surfaces could be an option too.