Problem casting my rifle's chamber (Remington 700, 6.5 creedmoor)

[Aced]

I'm having trouble casting my rifle's chamber on a Remington 700 (6.5 Creedmoor). Impressions come out distorted and won't seat properly. I used dental-style casting putty and quick-setting resin. Does anyone have recommended materials or step-by-step techniques that produce clean, accurate chamber casts?

 

[Brainwave]

I haven't personally cast a 6.5 Creedmoor chamber, but I've seen shooters use Cerrosafe successfully, so I will advice you clean the chamber thoroughly, apply a mold release, pour slowly at the correct temperature, and let it cool completely to avoid distortions and improper seating

 

[A Civilian]

I'm having trouble casting my rifle's chamber on a Remington 700 (6.5 Creedmoor). Impressions come out distorted and won't seat properly. I used dental-style casting putty and quick-setting resin. Does anyone have recommended materials or step-by-step techniques that produce clean, accurate chamber casts?

You're running into a common problem, the trick is to use a special alloy called Cerrosafe. Unlike the putty, this stuff melts and flows into all the tiny details, and the cast comes out perfect. You just melt it, pour it in, and push it out after a few minutes. It's what the pros use

 

[Teddy]

Cerrosafe is absolutely the way to go for a clean chamber cast, that putty stuff is a headache. Make sure your bore is totally degreased and plugged up snug...just melt that Cerrosafe, pour it slow, and let it cool completely. That'll give you a pro-grade impression. Good luck

 

[Aced]

I haven't personally cast a 6.5 Creedmoor chamber, but I've seen shooters use Cerrosafe successfully, so I will advice you clean the chamber thoroughly, apply a mold release, pour slowly at the correct temperature, and let it cool completely to avoid distortions and improper seating

Thanks, that’s helpful. I’ll try Cerrosafe, any tips on chamber prep?