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Double Rifles, Single Shots & Combinations >> Building Double Rifles & Gunsmithing

KiernanNZ
.224 member

Reged: 11/01/18
Posts: 31
Loc: Dunedin, New Zealand

Re: A couple of single shot Projects.
13/10/25 06:50 AM

I was thinking of shrinking it in with dry ice on the insert and heat on the barrel at about 0.0015" interference per 1" diameter at ambient. Maybe with hydraulic press assistance- I have access to all of these.
The rule of thumb is 0.001" interference per 1" diameter. My calcs say it should slip in at 0.0015"/Ø1". I've seen 5 thou on 3 inch interference fits (.00167"/Ø1") so it should go.
What would be the advantage of threading in over shrinking?

My reasoning for shrinking is a couple of posts on another forums gunsmithing section in which a member, who seems quite well respected by that forums other members, describing his process for shrink fitting an insert.
I have assisted in some shrink fitting (bigger stuff) and it's unbelievably strong.

Edited by KiernanNZ (13/10/25 02:26 PM)

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Subject	Posted by	Posted on
A couple of single shot Projects.	KiernanNZ	12/10/25 09:51 PM
Re: A couple of single shot Projects.	lancaster	12/10/25 11:03 PM
Re: A couple of single shot Projects.	KiernanNZ	13/10/25 06:50 AM
Re: A couple of single shot Projects.	Igorrock	13/10/25 05:20 AM
Re: A couple of single shot Projects.	KiernanNZ	13/10/25 08:14 AM

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