Thread: Rechambering question for you experienced machinists

In the realm of poking a reaming die into an already existing chamber and rechambering it to something new;
Q. If the new reamer (metaphorical wildcat chambering) has the same case head dimensions as the existing chamber, is this an issue to not take out any metal to 'clean up' or align a new chamber? If the new reamer (metaphorical wildcat chambering) is only longer than the existing chamber or has a different profile around the neck or shoulder, are there any inherent problems that can occur?
I understand that reaming an existing chamber with an Ackley Improved reamer is as common as a common thing, but what if the case length or freebore is also being changed?
I'm sure its a simple question to folk who've done it, I'm just not entirely sure on these points.

Yes yes I know.. 'go ask your gunsmith' I hear you say. I will, I will.. but there are some right here too.

Before you ask 'But what are you trying to actually do?'... I'm conducting an exercise in theoretical design and learn some points on chamber design, not actually trying to do anything as such.