Forums
New posts
Search forums
What's new
Articles
Latest reviews
Author list
Classifieds
Log in
Register
What's new
Search
Search
Search titles and first posts only
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Rifles, Reloading, Optics, Equipment
Gunsmithing
Cerrosafe --how to use?
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="Trickymissfit" data-source="post: 600566" data-attributes="member: 25383"><p>Cerrosafe is nothing more than generic Cerrobend, and was used in industry for years till better stuff came around. It has an extremely low shrinkage factor (way less than .001" per inch of diameter), and is probably much closer to .00025" per inch of diameter. I used to have to pull plugs I made with it to cover bolt holes with a drill and tapped hole and a knocker. It was that tight! I'd be checking the chamber with a bore scope before trying it one more time. I'd almost bet there is a ridge, or the chamber was cut with a banana shape all the way around in the middle of the case body contact. With anykind of taper in the chamber it should be completely free in about 1/8" of movement. Look real close where the body and shoulder meet for a ridge or a groove at the junction. Might try coating the chamber with Johnsons Pledge about three times before pouring the metal. You can decant it from a spray can, and apply it with a cheap artest brush. Pledge is an excellent release agent when working with epoxies.</p><p>gary</p></blockquote><p></p>
[QUOTE="Trickymissfit, post: 600566, member: 25383"] Cerrosafe is nothing more than generic Cerrobend, and was used in industry for years till better stuff came around. It has an extremely low shrinkage factor (way less than .001" per inch of diameter), and is probably much closer to .00025" per inch of diameter. I used to have to pull plugs I made with it to cover bolt holes with a drill and tapped hole and a knocker. It was that tight! I'd be checking the chamber with a bore scope before trying it one more time. I'd almost bet there is a ridge, or the chamber was cut with a banana shape all the way around in the middle of the case body contact. With anykind of taper in the chamber it should be completely free in about 1/8" of movement. Look real close where the body and shoulder meet for a ridge or a groove at the junction. Might try coating the chamber with Johnsons Pledge about three times before pouring the metal. You can decant it from a spray can, and apply it with a cheap artest brush. Pledge is an excellent release agent when working with epoxies. gary [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Gunsmithing
Cerrosafe --how to use?
Top