As Ian mentioned, we do not know how it was stored and how many times it was moved. Stated vintage being 1941 may or may not have to do with properties as found.
Bullet construction is flat base with an open base, lead core, and a cupronickel jacket (these bullets do attract a magnet). I found an average weight of 154.3 grains, extreme spread of 2.4 grains (max 156.0 gr, min 153.6 gr), and standard deviation of 0.66 grains. I tested the weight of 10 bullets using a calibrated Lyman electronic scale. This is definitely overpressure ammunition.
TURKISH MAUSER 1938 SCOPE CRACK
Primers showed consistent cratering, and the rifle developed a crack in the wrist of the stock by the end of the test firing. None of the rounds exhibited any indication of hagnfires, but recoil was more intense than normal. I found an average velocity of 2948 fps, extreme spread of 72 fps (max 2905, min 2977), and standard deviation of 22.24 fps. Measurements were taken at 10 feet from the muzzle, with a sample size of 15 rounds fired. I tested velocity using an 8mm Kar98k Mauser rifle (barrel length 23.6 inches). This ammunition has a well-deserved reputation for damaging semiautomatic rifle and machine guns due to poor storage causing pressure to increase above original specifications. It was packaged 1400 rounds to the crate, with 20 bandoliers per crate and 70 rounds per bandolier, on 5-round Mauser stripper clips. Most of the surplus Turkish 8mm ammunition available in th eUNited States at this time is 1940s production, with this sample being dated 1941. I actually got mine in really good shape second hand from someone who was not fond of it.Turkey adopted the 8mm Mauser cartridge as part of its modernization after World War One, and with the assistance of German technicians developed a copy of the German 8mm S cartridge. For the money and a little bit of fitting, it sure delivers a lot for a modest (inexpensive really BUT a pretty solid chuck of polymer! It adjusts to your fit well in the ergo department also) I have the black one. I LOVE the way I was able to adjust this stock to hold my Kale and it delivers exceptional accuracy in return. Its one of those things that if you like it you do an if not send it back. I have worked on many guns for many years and am an armorer and this stock actually wraps around the rifle keeping it secure instead of a traditional stock only held by the usual two bolt system. It also fit my M98 Mauser well.There was mention of the bottom mounting bolt not being strong enough. I LOVE IT! It is NOT a work of art at all but super functional IMHO. I shot it before mounting this stock and really fitting it and then after. self tap screw, Gorilla glue and a small hole drilled into the bottom of the spring fixed this perfectly. It worked great for my '40 Kale! Of course it takes a little work to make everything just right, as in the magazine spring not included and not anchored to the bottom. My reciever is large ring but it seems to be longer than my friends yugo mauser. Instructions: Some Minor Modification may be Required.Some Minor Modification may be Required.Note: Hidden aluminum barrel clamps secure scope mount.Must convert straight bolt or wide arc bolt Mausers to bent bolt with our Bolt Handle (MBH1800) to use a standard scope. Will not fit large-ring Swedish M38/96 6.5x55 or small ring Mausers.DuPont Extreme Temperature Glass Reinforced Polymer Stock.3M Soft Touch Cheekrest Pad for Improved Comfort When Shooting.Removes Limitations from Spring and Piston Type Recoil Suppression Systems.Eliminates the Felt Punch of the Recoil.Remains Flexible in Extreme Temperatures.Reduces the Challenge to Reacquire the Target by Minimizing the Muzzle Lift.Recoil Impact is Absorbed Shooting any Load Size can now be Done with No Pain being Transferred to the Shooter.Turn your Surplus Mauser into a Scout Rifle.Features of ATI Mauser 98 Stock Black w/ Built-In Scope Mount & Scorp.