Done 18 years of PH work with a 'post 64' model 70 in 458...NEVER ever had a seconds problem with it! Pre 64's are very sought after in africa! Sold the gun for 3x what I bought it new for after about 300 rounds down the barrel! OK I scoped it with a Leupold Vari X lll. 1.5 to 5 - great scope never had to re zero except once when I changed bullet weights!