Third paragraph in.
And if I did my math correctly (which I may not have, I suck at math) I find the 1800 fps round taking 140 some yards to overtake the 500 fps bullet. At that distance the trajectory between the two will be so huge there is no way either of these bullets would ever touch each other. Let alone hit each other in the barrel.
I will try to explain it a little better. I did actually mess my math up. Well I didn't really mess up the math, I just figured both bullets at a constant speed, which is wrong. Both are slowing down as they travel, and the slower bullet will slow down more. I played with a ballistics calculator and the faster bullet would actually take over the slower bullet at closer to 80 yards from what I can tell.
Based on a 40 grn bullet with a 50 yard sight in this is what I get. Time of flight for the 500 fps bullet at 80 yards is .493 seconds. Time of flight for the 1800 fps bullet after figuring in the .333 second delay is .482, so around 80 yards the faster bullet would pass the slower one. However the slower bullet will drop at a faster rate, the actual time of flight for the faster bullet at 80 yards is actually only .149 seconds, so it shoots flatter.
At 80 yards the the faster bullet would only drop .7 inches where as the slower bullet will drop 16.8 inches. So even though one can catch up to the other they will be 16 inches apart from each other on a vertical plain. So there is no way they could ever hit each other.
Make more sense now?
Paul
Paul