K3
Member
A guy at the range had a Contender in .338 Federal. Heckuva concussion even at an outdoor range, lemme tell you.
The guy said he was going to zero it at 100 yards. OK. He then said that the ballistics of the round were such that it would be zeroed again at 300 yards. I thought about asking him what the POI would be at 200...
Assuming the POI would be maybe 1-1/2 low at 200, muzzle velocity being 2700 fps per his claim, how could the bullet then rise again?
Now, I've taken a few physics classes, and I've got a nice compilation of ballistics references. IIRC, there are 2 points where the round crosses zero per se, but one is fairly close to the muzzle, say 25 yards give or take. After the 2nd point, the point where most folks 'zero' all the bullet does after that is drop due to gravity.
I have heard this rising bullet claim before. The guy said that for his .300Win zeroed at 200 yards, he could hold dead on at 1000 and hit. Now THAT is BS, as the POI is many FEET lower at 1000, depending on all the usual factors.
Was the guy at the range full of it? Or am I missing something here?
The guy said he was going to zero it at 100 yards. OK. He then said that the ballistics of the round were such that it would be zeroed again at 300 yards. I thought about asking him what the POI would be at 200...
Assuming the POI would be maybe 1-1/2 low at 200, muzzle velocity being 2700 fps per his claim, how could the bullet then rise again?
Now, I've taken a few physics classes, and I've got a nice compilation of ballistics references. IIRC, there are 2 points where the round crosses zero per se, but one is fairly close to the muzzle, say 25 yards give or take. After the 2nd point, the point where most folks 'zero' all the bullet does after that is drop due to gravity.
I have heard this rising bullet claim before. The guy said that for his .300Win zeroed at 200 yards, he could hold dead on at 1000 and hit. Now THAT is BS, as the POI is many FEET lower at 1000, depending on all the usual factors.
Was the guy at the range full of it? Or am I missing something here?