What calibers could you build a rifle into using this action with a new barrel and stock. Short, Long or Magnum Actions? Thanks

It depends on your budget, and how much work you are willing to do.

The list is vast, but the easiest ones are rounds based on the .308, .284 Win, 7X57 or 30-06, and there are a wealth of cartridges in that range.

If you are willing to open up the bolt, extractor, and do some possible magazene/feed rail work, you can use the 2.0-2.5" H&H case, ie 7, 300, 338, 458 and various wildcat mags, as well as some of the shortened 404 cased rounds.

If you want to puts lots o money into it, no reason a 500 Jeffrey couldn't be built, as it is designed for the std M98 action.

If you are willing to do extensive modifictions to the action and magazene, a 375 H&H length round can be fit, but there really is no reason to do this with the CZ-550 on the market, that is set up out of the box, and you'd be lucky to get a std mauser into that shape for twice the price, or more.

I hear people talk of how good these actions are. I see these Czech model 1924 8mm rifles in the shotgun news for sale. Are these the same rifles that are used for building custom rifles. Can these be rebarreled, new triggers and stocks fairly easy if sticking to the standard cartridges like you explained earlier? Do they make aftermarket stocks that will fit these actions and custom barrel manufactures such as Hart, Douglas, Pac Nor. I am new to this stuff , Please be patient with all the ??????

If you aren't concerned with budget, and like classic rifles, they are a good action to use. Look at Midway's sight for many stocks, barrels et al.

Now, if you have a gunsmith do all the work to bring the action up to modern standards, ie for scope use, you will be able to buy a new CZ-550 action for less $, or a complete Ruger, Rem Win rifle.

I built a 35 whelen ackley on one, but the action for $75, and doing all the work but chambering, which cost me $35 from a friend of a friend, and free bases/rings, it cost me ~$350 to make a rifle out of it, not including the scope!

I am now in the process of putting a wood stock on, and iron sights, which will add another ~$200 to the cost, and the pre-inletted stock was given to me.

When it is finished, and provided I do a decent job, I'll have a rifle that would cost me ~$2000 to have built for me, though it would have saved me many, many hours of labor.

I can think of few better ways to learn the gunmaking art then converting a military mauser to a sporter.

If you farm the work out as an attempt to get a rifle for less cost then a factory gun, you'll have less rifle, and not be happy. If you are looking for the basis of a classic custom rifle, then figure exactly what you want in a custom rifle, add it up, have a convulsion or two, but forge ahead and get a nice gun.

thanks for the reply Paul. That makes sense to me too.

AMEN! The rifle I built on a $50 Mauser action is the most expensive gun I own.