Some give it the small-bullet talk while others compare it … I bought mine used, with the longest kill on a groundhog being at 750yards. For starters, 18-22” barrels are the norm, although rifles made for long range shooting may have longer barrels still.Under 18” and you start wasting powder and don’t develop the full potential of the .308 round. .223 vs. .308 Bullet Trajectory. The shell casing was designed to ease case extraction and cartridge feeding in bolt action rifles as well as machine guns. In 1952, Winchester commercially released the .308 round along with chambering its Model 70 and Model 88 rifles for the cartridge. .308 Winchester Overview. This means that the momentum of a rifle's reaction will exactly equal the momentum of the bullet and powder gasses ejected from the barrel. Also check out the 7mm-08, 260, and 243, they are based on the 308 case. You are going to have to first compare accuracy potential of both 308 and 22 mag. For a .308 between 22" and 24" I would go 22....Me personally I'm going 20". The following ammunition cartridge ballistics information and chart can be used to approximately compare .22-250 Remington vs .308 Winchester ammo rounds. The .308 was designed to be efficient in 20" to 22" barrels. By Chuck Hawks. One of my favorite general-use firearms is the Smith & Wesson Model 317 Kit Gun. For case dimensions such as the 7mm08 (plus the .308 and .243), there's not much velocity difference between 22" and 24". It's not apples to apples, 22 mag might be 2" at 100Y and 308 might be 3/4". 24" and 26" barrels do make a difference for those cartridges which are slightly overbore, such as those whose cases are similar to the '06. If I'm going to shoot a 24" barrel it's going to be in a hot flat cartridge. Some of the best all-around guns are sometimes the ones that are overlooked. Please note, the following information reflects the estimated average ballistics for each caliber and does not pertain to a particular manufacturer, bullet weight, o Ruger 10/22 .22LR Rifle Unsuppressed Firing CCI standard velocity ammo Remington ZOO LTR Suppressed Firing .308 Federal Gold Medal Match 168gr BTHP AR-15, Barrel Suppressed Firing 55gr FMJ Glock GIZ 9mm Suppressed Firing Remington UMC 147gr ammo Walther P22 .22LR Pistol, Suppressed Firing CCI standard velocity ammo Ruger 10/22 .22LR Rifle Because it has a lighter bullet and faster speeds, the .223 Winchester usually maintains a flatter trajectory. The 22 Magnum cartridge has its share of lovers and haters and I happen to be a fan. Then onto wind drift comparison of both on a ballistic app. At … The 308 will reach to 1000. 1,000 yards is probably a bit of a stretch for a 22 cal bullet. Some calibers need the barrel length to really gain the pros of the caliber. 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