5mm question

[Cornbelt]

Can anyone tell me what the bore and twist is on a typical 5mm? Is this something they have barrel blanks available for?

[trotterlg]

They are .204 bore, I have seen some blanks on auction arms and made up a H&R rifle in 5mm RFM just for  fun.  They are kind of high pressure for a rf so you have to perfectly and completely support the case and rim with the action and chamer.  I chambered the barrel with the ejector in it to get a perfect fit.  Larry

http://www.auctionarms.com/search/displayitem.cfm?itemnum=8923578

[Catfish]

I would wait a while be fore I bought one. It is an excellant round, far better than a .22 mag., but I heard the the new imported ammo is not very accurate. Keep your ears open and if the ammo gets better then pick one up.

[Cornbelt]

I hear their loadings have improved, and the bbl on the auction site looks interesting; low price.  Too bad I can't view the registration page with only two days left before the auction closes. Que ce ROT ce ROT !      I would really like to put this on a single-shot for fun.  Even a liner might make sense, but the rf liners only go up to .22 mag, and the cf only down to .25. Maybe waiting a while will see the loadings continue to improve, the popularity increase, and options become more available. (For as little effort as it takes, sometimes waiting is a chore.)  

[notnodak]

Can a person have a 22mag rifle relined or a 17HMR bored out to shot the 5mm?

[Cornbelt]

Brownells' doesn't list any liners for that cal. But it might be feasable if you could find one. Other factors come into play like firing pin alignment, etc.