Chamber cast Cerro-Safe

[mikeinct]

I saw treemans Post about the paper funnel trick . Good tip, any other helpful hints before I melt & pour this stuff into a rifle throat & chamber ? I'm leaving this thing, sm mauser 25/223 assembled. I've only used this Cerro-safe stuff once in a Savage barrel off the action. TIA mike in ct

 

[matthias]

A light coat of oil can help with release.
Avoid mechanical locks by not pouring too much in.
Cotton ball as a plug , further down the bore than you think you need an inch or so will help with a cleaner chamber cast as the volume will keep everything liquid a bit longer

 

[mikeinct]

Wait till you guys see the disaster I call the 25 Goofy. My retirement project. The rough throat is just the start of this headache. I found some odd [rifling looking] impressions in the end of some of my brass cases . & No they are not over-length...more later, mike

 

[AckleymanII]

I put two oily patches down the bore, and chamber, and I just used patches as a plug. I pour about 1/2-1" in front of the throat. I use a long wood dowel to knock the chamber cast out, catch it in an old towel or other soft material.

Using a "RCBS" lead dipper like you are going to Cast bullets makes things easy.

Trying to take a chamber cast with the barrel on the action takes more than I have patience for.

Only take a chamber cast of a very clean chamber and barrel.

 

[rammac]

I've used Cerro-Safe to cast chambers with the bolt locked. It allows me to measure dimensions from the bolt face. It's not something that I would recommend to a novice because it's really easy to screw up and jam the bolt closed. Suffice to say you need to use oil or something as a release agent and you have estimate how much Cerro-Safe you need so that it provides a cast just into the lands about an inch or so.

 

[Shawnba67]

If you cast 4 inchs of bore you will never get it out! a standard heat gun will melt it out of a rifle. it melts at like 200 degrees far lower than any metal or finish. It will be real hard to mess up bad enough to cost you anything but time

 

[LA50SHOOTER]

Most accurate dimensions will be in 1 hour after the cast has been poured.

 

[mikeinct]

Sorry this took so long. I did the chamber cast. I have .302 to .313 Apx. freebore & the throat is .260 is fairly smooth ... This could be, as I suspected: a neck for a 257 Weatherby Magnum . I don't see how I will ever get this rifle to shoot my little short 70 grain gas checked cast bullet. Any useful suggestions please help. mike in ct

 

[jrm850]

Cerrosafe is a pretty amazing stuff. In addition to chamber casting I also use it to cast barrel vise blocks for sporters. Works great and any residual rosin floats right out if I need to melt them down for a chamber cast.