over pressure in the catridge. this is really unsafe . stop shooting the ammo now !!!! are these handloads or factory loads. if factory contact maker now.
You need to specify a Model 74 WHAT.
your Winchester model 74 was made in 1940.
Your Winchester model 74 was made in 1954.
Your Winchester model 74 was made by Winchester in 1951.
Your Winchester model 74 was made by winchester in 1950.
Your winchester model 74 was produced by winchester in 1949.
your Winchester model 74 was made in 1952.
your model 74 was one of the first made in the year 1939.
Your Winchester model 74 was made in the first year of production,which was 1939.
Your Winchester model 74 was made in the first year of production,which was 1939.
11 am 74 seconds into flight
Your serial number indicates that your Winchester model 74 was made in the second year of production.which was 1940.That year Winchester made 36,195 model 74,s of which yours was one.