Hello everyone,I have a question I hope you can help me with. I just aquired a Argentine Rolling Block and from what I have read on here,it is advisable to make a chamber cast first to make sure it has not been rechambered at some point.My question is,how do you do this.I have read the product information about Cerrosafe on the Brownells website but would like more details,like do you pour it all the wat to the top so the rim is part of the casting? Any help is appreaciated.

If you follow the instructions, that'll pretty much do it. I would disassemble the action so as to not accidentally get the cerrosafe in the wrong place. When I plug my barrel I put the plug far enough down so that I get some of the rifling (assuming you have enough cerrosafe to do this). That way you can measure the lands & grooves easily.

If you're just trying to verify the chambering there probably isn't a need to fill it all the way to the top of the rim as you can measure the rim dimensions pretty easily from the rifle. I have poured them to the top, but it was because I was sending the casting off to get custom brass made up.

Also plug up the extractor slot or any other small hole that the melt could get down into by accident. I also tape off the wood or anything else that could be damaged by an accidental spill.





Hope this help,


Matt

Just one other thing to add. Let it cool and it will come out easier than if you try to get it out quickly. A quick rap on a cleaning rod will free it up.

Thanks for the pics. I finally got around to ordering some cerrosafe and as soon as it gets here I will give it a go!