Congrats on the new gun. I own several Mausers including a Yugo and they are great fun. Probably the best buy out there in a quality rifle. Mine is pretty much as accurate as a currently manufactured commercial rifle. I can't say that with certainty because I never used a scope, but it shoots as well as I can with iron sights at 100 yards. An off topic comment on C&R rifles. I am a fanatic about leaving these rifles in issued condition. My opinion is that they are part of history. If I want a sporter rifle with a scope I will buy a new Remington. But......... I came across a scout scope mount for my Finn M39s that replaces the rear sight. It requires no modification to the rifle and can be easily removed returning the rifle to original condition. I removed the Leupold Scout Scope from my .444 Marlin and proceeded to see what this old rifle was capable of. My first three shots at 100 yards were touching using S&B factory ammo. Don't let anyone tell you these old rifles arn't everything they are cracked up to be.
As for cleaning after corrosive ammo, I do the Windex thing at the range after I am done shooting. I spray the Windex down the barrel from the chamber end until it is running out the muzzle. I then run a few patches through the bore to spread the Windex around and clean the worst of the fouling out of the bore. I then follow up with a patch or two of Hoppes which I leave in the bore for the ride home allowing it to work on the copper fouling. At home I clean the rifle as I would any other rifle and have had no problems with corrosion. I do dissassemble the bolt when I shoot corrosive ammo. I am not sure this is nessessary, but I had a bad experience with my Remington 700ML from black powder which is also corrosive. I was shooting it several days in a row and did not take down the bolt until I was done shooting it on the last day. I had significant corrosion inside the bolt. Luckily the rifle is stainless and the only damage is discoloration of the metal after I cleaned it up. I imagine that the same thing could happen with the corrosive cartridge ammo so I don't take any chances. It is easy anyway, so why not. It has been reported that ammonia is harmful to your rifles bore. Many bore cleaners contain ammonia to dissolve copper fouling, but they tell you on the bottle to no leave it in your bore for longer than 15 minutes. Since Windex contains ammonia, I do not leave it in the bore for an extended period of time and I clean the Windex out with regular Hoppes bore solvent before putting the rifle away. I usually finish up with a patch lightly soaked in oil to further protect the bore.
I try to avoid shooting corrosive ammo in my C&R rifles. I handload for the .303s and the 7.62x54s but in the 8mm, this surplus ammo is just too good to pass up. It shoots great in my rifles and is almost free. I loaded up on it.
