Cerrosafe casting alloy

[Dave 101]

Does any one know where to get cerrosafe [ for chamber casts ] from in the UK ?

Thanks Dave

[dromia]

Midway used to do it.

Not a fan of the stuff myself, the expansion/shrinkage rate chart that comes with it is way off, an internet search should give you the updated values.

You need to take care not to let it get too hot before pouring.

As I have said I couldn't recommend it, to be honest hard candle wax is as good.

However if you want an accurate representation of your chamber mouth/freebore/leade/bore/groove/rifling then an impact cast is what you want to take, easy to do and all I use now.

[Dave 101]

Thanks Adam , may give wax a try ,

Dave

[dromia]

Honestly an impact cast is just as easy and far more accurate.

[Meaty]

+1 on the impact cast method-I got a 0.002" difference between cerrosafe and impact cast on the groove diameter.

[FredB]

Use a car body filler or something similar such as Plastic Padding. Totally stable, does not shrink on setting. Clean bore with a lightly greased patch to avoid sticking. Used it for years----far superior to cerrosafe.
Fred

[Dave 101]

I have just removed the wax cast , its sufficient for my needs just for a look at the chamber no need for any measuring , so long as I am careful with the wax and store it in the fridge .

Dave

[dromia]

:goodjob:

[ukrifleman]

bore slugs.jpg (5.52 KiB) Viewed 2985 times

Candle wax works well and doesn't shrink. Make sure the bore is clean before pouring and be gentle when you take measurements, remember wax is soft.

ukrifleman.