Keith,
Working with mausers can be fun. But, a cautionary not to you here.
The mauser action you have was originally designed to fire the 8mm round, which is a lower pressure round in the 40,0000 psi range.
Israel, in utter desperation, bought a huge number of these mausers, and put 7.62 Nato barrels on then. The 7.62 Nato round is a higher pressure round, in the low to mid 50,000 psi range.
Note that your barrrel is stamped "7.62" and not .308 Winchester. The .308 Winchester is a much higher pressure round than the 7.62 Nato, and has a SAAMI spec of 66,000 psi!!! (This is 20,000 psi higher than the cartridge that this rifle was designed for.) The rifle you have was simply not designed to handle this type of pressure, and you should note that many of the rifles were worn out surplus to begin with.
So, I caution you not to shoot the .308 Winchester round in your rifle, and if you decide to shoot 7.62 Nato, you should be sure that they are low pressure rounds. Lots of the surplus Nato rounds that are around were loaded "hot" to work well in automatic weapons, and particularly those coming out of South America.
Check Numrich Arms (GunParts Inc.) for a surplus stock. You may also check
Saamco and Sarco.
Best Regards,
Mannyrock