I own a Winchester Model 70 Super Grade in 7x57mm , but I’ve been reading a lot of good things about the “new” .280 Ackley. Recently I obtained a die set for that cartridge and I have on hand a large amount of components – powder, cases, primers, and bullets, that I’ve been using in my 7x57mm. Although I hate to part with my Model 70 in 7×57, I’m thinking about trading or selling it and buying a rifle in .280 Ackley. Nosler chambers for it but the price is a bit rich for my wallet. Is there a cheaper rifle available in .280 Ackley? Also, I have noticed that the Norma 7mm bullets I have are .283″ diameter while almost all other makes of 7mm bullets are .284″. What effect would this have on accuracy?
‚Äì James Roth
If the barrel of your 7×57 is still in good condition and delivers the accuracy you require, there is no real reason to trade it or sell it for another rifle. At relatively little cost it can be rechambered for .280 Ackley calibre. If you are fond of the gun and it handles well, this would seem to be the best solution, as well as the most economical. Even if you prefer a new barrel, there is still no reason to buy a complete new gun – just have your Model 70 rebarreled to .280 Ackley. It has a 1:9- 1/2″ twist which is all right for the .280 Ackley Improved. You will find that .283″ diameter bullets perform as well as those measuring .284″.