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rcromwell92
Optics GrassHopper Joined: June/16/2020 Location: Commifornia Status: Offline Points: 2 |
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Posted: June/16/2020 at 21:08 |
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Urimaginaryfrnd
MODERATOR Resident Redneck Joined: June/20/2005 Location: Iowa Status: Offline Points: 14964 |
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When scopes are designated for a specific caliber that means the balistic reticle approximates typical ammo for that caliber and can be used to approximate the trajectory of that bullet. Any change in the weight or speed of the bullet of course alters the trajectory. Many rifles share relatively similar trajectory paths and one can of course use any optic on any rifle. If you take any scope and zero it at 100 yds that point is a fixed point and is always the same. What happens is when you look at the mark that should represent 200 yds or 300 yds or any other distance to really know if the reticle is true for that specific weight and speed of bullet you test it on the range. No matter what caliber the scope was originally designed for you can use it on your 7.62x39 rifle and if you find that when zero is set at 100 the mark that should represent 300 yds provides you with impacts on the target that are consistently low six inches at three hundred then make notes and tape them to the scope cover or stock so you can refer to them next time out. Once you have figured out where point of impact is at the distances you want then that information is always repeatable. Accurate within 3inches at 100 yds is not real accurate. For example Tikka rifles guarantee 1 inch groups or less at 100 yds or the rifle does not leave the factory. Custom shops like GAPrecision and TacOps on some rifle guarantee accuracy down to about 1/4 inch but those are expensive rifles and a good gunsmith can often help most rifles do a little better than they do right out of the box. How the stock fits you and what you use for a sling or rest can make a big difference. A2 type AR guns benefit from the type of sling used in NRA service rifle competition where M4 type guns benefit from sings like Advanced Gunslinger Hit sling.
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