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Need Advice on a Rifle
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<blockquote data-quote="Swiftkill" data-source="post: 1502129" data-attributes="member: 104167"><p>Grouping is repeatability. Most shooters incorrectly equate the word accuracy to repeatability; that has just been engrained in our sport. If you don't flinch on the first shot and you are steady on target, the bullet should go where it is supposed to within the capability (MOA capability of the rifle) and assuming it has been sighted in for a cpold barrel shot and assuming you have compensated for a change in altitude, temperature and pressure and assuming no wind. A lightweight barreled 300 win mag is not meant to shoot 5 times in a row in a minute's time. The barrel will heat up and the POI will change, at least a little and sometimes a lot. </p><p></p><p>As far as outside forces... use a ballistic calculator and use your load's muzzle velocity and calculate your drop at your rifle range at 300 feet above sea level and then recalculate that at 7000 ft elevation, even at 3000 ft and see how dramatic the bullet drop difference is. Now go from 80 degree ambient to 30 degree ambient and that doesn't take into account the change in the cartridge and barrel dimensions and properties due to temperature change. Your shot can also move left or right. You NEED to sight in at the place you are hunting. Sure you can get away with small errors and most big game rifles won't be affected by much at 100 yards, but even at 200 yards it could be a miss or less than optimal hit compounded by any human error like heavy breathing and a loud heartbeat, fogging glasses, fogging scope. (There are many more factors I have not discussed here). There's no substitute for shooting your gun in the real world.</p></blockquote><p></p>
[QUOTE="Swiftkill, post: 1502129, member: 104167"] Grouping is repeatability. Most shooters incorrectly equate the word accuracy to repeatability; that has just been engrained in our sport. If you don't flinch on the first shot and you are steady on target, the bullet should go where it is supposed to within the capability (MOA capability of the rifle) and assuming it has been sighted in for a cpold barrel shot and assuming you have compensated for a change in altitude, temperature and pressure and assuming no wind. A lightweight barreled 300 win mag is not meant to shoot 5 times in a row in a minute's time. The barrel will heat up and the POI will change, at least a little and sometimes a lot. As far as outside forces... use a ballistic calculator and use your load's muzzle velocity and calculate your drop at your rifle range at 300 feet above sea level and then recalculate that at 7000 ft elevation, even at 3000 ft and see how dramatic the bullet drop difference is. Now go from 80 degree ambient to 30 degree ambient and that doesn't take into account the change in the cartridge and barrel dimensions and properties due to temperature change. Your shot can also move left or right. You NEED to sight in at the place you are hunting. Sure you can get away with small errors and most big game rifles won't be affected by much at 100 yards, but even at 200 yards it could be a miss or less than optimal hit compounded by any human error like heavy breathing and a loud heartbeat, fogging glasses, fogging scope. (There are many more factors I have not discussed here). There's no substitute for shooting your gun in the real world. [/QUOTE]
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