This free-range New Zealand sambar was taken with an M700 BDL rebarreled to .300 H&H. In both the 19th and 20th centuries, American gunmakers probably designed and produced more great firearms than any country on Earth. Some have had lasting impact and passed the century mark—Colt’s Single Action Army, the Winchester Model 94 and the Browning-designed Colt 1911 come immediately to mind. Many more have passed the half-century mark and beyond. In 2012 two extremely important American bolt-actions celebrate important birthdays. The timeless Winchester Model 70, introduced in 1937, is now 75 years young. Remington’s Model 700, introduced in 1962, celebrates its 50th. Last month I wrote about the Model 70; this month it’s the …