Can a rifle be custom made in any caliber/cartridge even if that cartridge has no SAAMI specs?
I want to get a custom made bolt action rifle in 7.7x58 Japanese Arisaka. I don't want to use a rifled action taken from one of the milsurp rifles, I want a completely newly made, custom made rifle. I have some reasons why I want to do this, but my question is can it be done, and if so who would do it? One reason I want to do this is because I want a left handed bolt rifle, and the milsurps are all right-handed. Another reason is that I want a nicely made rifle with a free-floated barrel where I can mount a scope the traditional way (above the receiver). Can not really do that with the Arisaka milsurps because the chamber gas holes are where the front scope mount would go. Biggest reason I want to do this is that I have managed to get a couple of pieces of brass, some primers, and powder and some Hornady 0.312 bullets and the custom made dies for reloading, so I do not want to get into a whole different caliber like 30'06 or 308 or 270. I'd rather stick with the 7.7x58.
The T99 7.7 Arisakas have a 1 in 9.5 twist and I'd be wanting to use standard 7.7x58 brass with 150 grain Hornady soft point bullets, 0.312 diameter. I reload for a milsurp 7.7 Arisaka and I had custom reloading dies made from fired brass to match the chamber of my milsurp rifle. I'd like to try to get the newly made custom rifle to have a chamber that matches closely enough to be able to use those same dies.
I have a T99 that I mounted a scout scope to with a no-drill mount from S&K Mounts. I do NOT want to pull this rifle apart and turn it into something customized. I want to keep it in the current configuration, but I'd like a nice, custom made one that can use the same rounds.
So, is this possible? As far as I know, no one makes a commercial version of this caliber/cartridge. This would be entirely custom chamber, custom rifling.